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12035f2f39266684ea19a9eabaaf323a4eaab0c3
tactility/Tactility/Source/bluetooth/BluetoothHidHost.cpp
T
Adolfo Reyna 78382d6deb fix(bluetooth): robust HID host autoconnect and combo keyboard parser 
- Scan: store nameless directed adv to keep addr_type cache for Fosmon-type
  keyboards that wake without name -> fixes auto-connect on boot not finding device
- HID parser: strip Report ID, support standard 3/4-byte mouse [btn,x8,y8,wheel]
  instead of mis-detecting as 12-bit packed; heuristic only when std small
- HID reconnect: try PUBLIC then RANDOM addr_type with 8s timeout,
  periodic retry timer (3/10/30s backoff) that exists at boot via ensureAutoConnTimer,
  direct connect even without advert after empty scans to catch wake-on-keypress
- Verified on waveshare-esp32-s3-rlcd /dev/cu.usbmodem1101 - Fosmon mini
  B00BX0YKX4 combo now moves smoothly and reconnects after board restart

Co-authored-by: Hermes Agent <hermes@noreply>
2026-07-12 15:26:40 -04:00

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#ifdef ESP_PLATFORM
#include <sdkconfig.h>
#endif
#if defined(CONFIG_BT_NIMBLE_ENABLED)
#include <Tactility/bluetooth/Bluetooth.h>
#include <Tactility/bluetooth/BluetoothPairedDevice.h>
#include <Tactility/bluetooth/BluetoothPrivate.h>
#include <Tactility/Assets.h>
#include <Tactility/Logger.h>
#include <Tactility/Tactility.h>
#include <Tactility/lvgl/Keyboard.h>
#include <Tactility/lvgl/LvglSync.h>
#include <host/ble_gap.h>
#include <host/ble_gatt.h>
#include <host/ble_hs.h>
#include <host/ble_uuid.h>
#ifdef min
#undef min
#endif
#ifdef max
#undef max
#endif
#include <esp_timer.h>
#include <freertos/FreeRTOS.h>
#include <freertos/queue.h>
#include <lvgl.h>
#include <algorithm>
#include <array>
#include <atomic>
#include <cstring>
#include <memory>
#include <vector>
#define TAG "BtHidHost"
#include <esp_log.h>
namespace tt::bluetooth {
static const auto LOGGER = Logger("BtHidHost");
// ---- Report type ----
enum class HidReportType : uint8_t { Unknown = 0, Keyboard, Mouse, Consumer };
struct HidHostInputRpt {
uint16_t valHandle;
uint16_t cccdHandle;
uint16_t rptRefHandle;
uint8_t reportId;
HidReportType type;
};
struct HidHostCtx {
uint16_t connHandle = BLE_HS_CONN_HANDLE_NONE;
uint16_t hidSvcStart = 0;
uint16_t hidSvcEnd = 0;
std::vector<HidHostInputRpt> inputRpts;
std::vector<uint16_t> allChrDefHandles;
int subscribeIdx = 0;
int dscDiscIdx = 0;
int rptRefReadIdx = 0;
uint16_t rptMapHandle = 0;
std::vector<uint8_t> rptMap;
bool securityInitiated = false;
bool typeResolutionDone = false;
bool readyBlockFired = false;
bool encrypted = false;
bool dscsDiscovered = false;
lv_indev_t* kbIndev = nullptr;
lv_indev_t* mouseIndev = nullptr;
lv_obj_t* mouseCursor = nullptr;
std::array<uint8_t, 6> peerAddr = {};
};
// ---- Globals ----
static std::unique_ptr<HidHostCtx> hid_host_ctx;
static QueueHandle_t hid_host_key_queue = nullptr;
static uint8_t hid_host_prev_keys[6] = {};
static esp_timer_handle_t hid_enc_retry_timer = nullptr;
static std::atomic<int32_t> hid_host_mouse_x{0};
static std::atomic<int32_t> hid_host_mouse_y{0};
static std::atomic<bool> hid_host_mouse_btn{false};
static std::atomic<bool> hid_host_mouse_active{false};
#define HID_HOST_KEY_QUEUE_SIZE 64
struct HidHostKeyEvt { uint32_t key; bool pressed; };
// ---- Forward declarations ----
static void hidHostSubscribeNext(HidHostCtx& ctx);
static void hidHostStartRptRefRead(HidHostCtx& ctx);
static void hidHostReadReportMap(HidHostCtx& ctx);
static uint16_t getDescEndHandle(const HidHostCtx& ctx, uint16_t valHandle);
// ---- Keycode mapping ----
static uint32_t hidHostMapKeycode(uint8_t mod, uint8_t kc) {
bool shift = (mod & 0x22) != 0;
switch (kc) {
case 0x28: return LV_KEY_ENTER;
case 0x29: return LV_KEY_ESC;
case 0x2A: return LV_KEY_BACKSPACE;
case 0x4C: return LV_KEY_DEL;
case 0x2B: return shift ? (uint32_t)LV_KEY_PREV : (uint32_t)LV_KEY_NEXT;
case 0x52: return LV_KEY_UP;
case 0x51: return LV_KEY_DOWN;
case 0x50: return LV_KEY_LEFT;
case 0x4F: return LV_KEY_RIGHT;
case 0x4A: return LV_KEY_HOME;
case 0x4D: return LV_KEY_END;
default: break;
}
if (kc >= 0x04 && kc <= 0x1D) {
uint32_t c = static_cast<uint32_t>('a' + (kc - 0x04));
return shift ? (c - 0x20) : c;
}
if (kc >= 0x1E && kc <= 0x27) {
static const char nums[] = "1234567890";
static const char snums[] = "!@#$%^&*()";
int i = kc - 0x1E;
return shift ? static_cast<uint32_t>(snums[i]) : static_cast<uint32_t>(nums[i]);
}
if (kc == 0x2C) return ' ';
return 0;
}
static void hidHostKeyboardReadCb(lv_indev_t* /*indev*/, lv_indev_data_t* data) {
if (!hid_host_key_queue) { data->state = LV_INDEV_STATE_RELEASED; return; }
HidHostKeyEvt evt = {};
if (xQueueReceive(hid_host_key_queue, &evt, 0) == pdTRUE) {
data->key = evt.key;
data->state = evt.pressed ? LV_INDEV_STATE_PRESSED : LV_INDEV_STATE_RELEASED;
data->continue_reading = (uxQueueMessagesWaiting(hid_host_key_queue) > 0);
} else {
data->state = LV_INDEV_STATE_RELEASED;
}
}
static void hidHostHandleKeyboardReportInternal(const uint8_t* data, uint16_t len, uint8_t expected_report_id);
static void hidHostHandleMouseReportInternal(const uint8_t* data, uint16_t len, uint8_t expected_report_id);
static void hidHostHandleKeyboardReport(const uint8_t* data, uint16_t len);
static void hidHostHandleMouseReport(const uint8_t* data, uint16_t len);
// ---- Early impls so other funcs can call them ----
static void hidHostHandleKeyboardReportInternal(const uint8_t* data, uint16_t len, uint8_t expected_report_id) {
if (len < 3 || !hid_host_key_queue) return;
// Strip leading Report ID if present (some HOGP combo devices prepend it)
size_t offset = 0;
if (expected_report_id != 0 && len >= 1 && data[0] == expected_report_id) {
offset = 1;
if (len - offset < 3) return;
}
const uint8_t* body = data + offset;
uint16_t body_len = len - offset;
uint8_t mod = body[0];
const uint8_t* curr = (body_len >= 2) ? &body[2] : body;
int curr_offset = (body_len >= 2) ? 2 : 0;
int nkeys = std::min((int)(body_len - curr_offset), 6);
for (int i = 0; i < 6; i++) {
uint8_t kc = hid_host_prev_keys[i];
if (kc == 0) continue;
bool still = false;
for (int j = 0; j < nkeys; j++) { if (curr[j] == kc) { still = true; break; } }
if (!still) {
uint32_t lv = hidHostMapKeycode(0, kc);
if (lv) { HidHostKeyEvt e{lv, false}; xQueueSend(hid_host_key_queue, &e, 0); }
}
}
for (int i = 0; i < nkeys; i++) {
uint8_t kc = curr[i];
if (kc == 0) continue;
bool had = false;
for (int j = 0; j < 6; j++) { if (hid_host_prev_keys[j] == kc) { had = true; break; } }
if (!had) {
uint32_t lv = hidHostMapKeycode(mod, kc);
if (lv) { HidHostKeyEvt e{lv, true}; xQueueSend(hid_host_key_queue, &e, 0); }
}
}
std::memcpy(hid_host_prev_keys, curr, nkeys);
if (nkeys < 6) std::memset(hid_host_prev_keys + nkeys, 0, 6 - nkeys);
}
static void hidHostHandleKeyboardReport(const uint8_t* data, uint16_t len) {
hidHostHandleKeyboardReportInternal(data, len, 0);
}
static void hidHostMouseReadCb(lv_indev_t* /*indev*/, lv_indev_data_t* data) {
int32_t cx = hid_host_mouse_x.load();
int32_t cy = hid_host_mouse_y.load();
lv_display_t* disp = lv_display_get_default();
if (disp) {
int32_t ow = lv_display_get_original_horizontal_resolution(disp);
int32_t oh = lv_display_get_original_vertical_resolution(disp);
switch (lv_display_get_rotation(disp)) {
case LV_DISPLAY_ROTATION_0:
data->point.x = (lv_coord_t)cx;
data->point.y = (lv_coord_t)cy;
break;
case LV_DISPLAY_ROTATION_90:
data->point.x = (lv_coord_t)(ow - cy - 1);
data->point.y = (lv_coord_t)cx;
break;
case LV_DISPLAY_ROTATION_180:
data->point.x = (lv_coord_t)(ow - cx - 1);
data->point.y = (lv_coord_t)(oh - cy - 1);
break;
case LV_DISPLAY_ROTATION_270:
data->point.x = (lv_coord_t)cy;
data->point.y = (lv_coord_t)(oh - cx - 1);
break;
}
} else {
data->point.x = (lv_coord_t)cx;
data->point.y = (lv_coord_t)cy;
}
data->state = hid_host_mouse_btn.load() ? LV_INDEV_STATE_PRESSED : LV_INDEV_STATE_RELEASED;
if (!hid_host_mouse_active.load()) {
hid_host_mouse_active.store(true);
if (hid_host_ctx && hid_host_ctx->mouseCursor) {
lv_obj_remove_flag(hid_host_ctx->mouseCursor, LV_OBJ_FLAG_HIDDEN);
}
}
}
static void hidHostHandleMouseReportInternal(const uint8_t* data, uint16_t len, uint8_t expected_report_id) {
int32_t dx = 0;
int32_t dy = 0;
bool btn = false;
if (len == 0) return;
// Strip Report ID prefix if present. Many combo HOGP devices (e.g. Fosmon
// mini KB + touchpad: https://a.co/d/0fg4vprm) use Report IDs:
// ID 1 = keyboard, ID 2 = mouse/touchpad. NimBLE notifies the raw char
// value *including* the ID byte for some stacks. If first byte matches
// the expected ID and remaining length looks like a mouse report, strip it.
const uint8_t* p = data;
uint16_t plen = len;
if (expected_report_id != 0 && len >= 2 && data[0] == expected_report_id) {
p = data + 1;
plen = len - 1;
}
if (plen < 3) return;
if (plen >= 5) {
// Two possible interpretations for 5-byte reports:
// A) Standard extended: [buttons, x8, y8, wheel, pan]
// B) Logitech 12-bit packed: [buttons, ?, x_lo, x_hi_nibble|y_lo_nibble, y_hi]
//
// Heuristic to avoid breaking cheap touchpads (Fosmon/etc) which send (A):
// - Try standard decode first: dx=(int8)p[1], dy=(int8)p[2]
// - Try 12-bit decode: raw_x = p[2] | ((p[3]&0x0F)<<8), raw_y = (p[3]>>4)|(p[4]<<4)
// If standard dx/dy are small (|dx|,|dy| <= 127 fits int8) and 12-bit result
// would imply a huge jump (abs>200) while standard is modest (<50), prefer standard.
// This keeps Logitech high-res mice working (they emit true 12-bit values where
// standard decode looks like random / large wheel bytes) while not breaking
// touchpads that emit [btn, x, y, wheel, 0].
int8_t std_dx = (int8_t)p[1];
int8_t std_dy = (int8_t)p[2];
int16_t raw_x12 = p[2] | ((p[3] & 0x0F) << 8);
if (raw_x12 & 0x0800) raw_x12 |= 0xF000;
int16_t raw_y12 = (int16_t)((p[3] >> 4) | (p[4] << 4));
if (raw_y12 & 0x0800) raw_y12 |= 0xF000;
// Detect 12-bit: if wheel byte position (p[3]) in standard view looks like
// plausible wheel (typically 0 or small) but 12-bit gives large coordinate,
// AND standard dx/dy are within typical touchpad incremental range, use standard.
bool std_small = (std::abs((int)std_dx) <= 48 && std::abs((int)std_dy) <= 48);
bool s12_large = (std::abs((int)raw_x12) > 128 || std::abs((int)raw_y12) > 128);
if (std_small && s12_large) {
// Most likely NOT 12-bit packed, it's a standard report with wheel byte
btn = (p[0] & 0x01) != 0;
dx = std_dx;
dy = std_dy;
} else if (s12_large || !std_small) {
// Could be either, but if standard dx/dy are huge maybe it's really 12-bit
// Prefer 12-bit only when standard parse looks pathological AND 12-bit looks
// like plausible incremental movement (abs <= 300)
if (std::abs((int)raw_x12) <= 300 && std::abs((int)raw_y12) <= 300 &&
(std::abs((int)std_dx) > 64 || std::abs((int)std_dy) > 64 || p[1] == 0)) {
btn = (p[0] & 0x01) != 0;
dx = (int16_t)raw_x12;
dy = (int16_t)raw_y12;
} else {
btn = (p[0] & 0x01) != 0;
dx = std_dx;
dy = std_dy;
}
} else {
btn = (p[0] & 0x01) != 0;
dx = std_dx;
dy = std_dy;
}
} else {
// 3 or 4 bytes: standard boot protocol
btn = (p[0] & 0x01) != 0;
dx = (int8_t)p[1];
dy = (int8_t)p[2];
}
lv_display_t* disp = lv_display_get_default();
int32_t w = disp ? lv_display_get_horizontal_resolution(disp) : 320;
int32_t h = disp ? lv_display_get_vertical_resolution(disp) : 240;
int32_t nx = hid_host_mouse_x.load() + dx;
int32_t ny = hid_host_mouse_y.load() + dy;
if (nx < 0) nx = 0;
if (nx >= w) nx = w - 1;
if (ny < 0) ny = 0;
if (ny >= h) ny = h - 1;
hid_host_mouse_x.store(nx);
hid_host_mouse_y.store(ny);
hid_host_mouse_btn.store(btn);
if (hid_host_ctx && hid_host_ctx->mouseIndev == nullptr) {
getMainDispatcher().dispatch([] {
if (!hid_host_ctx || hid_host_ctx->mouseIndev != nullptr) return;
if (!tt::lvgl::lock(1000)) { LOGGER.warn("LVGL lock failed for mouse indev"); return; }
auto* ms = lv_indev_create();
lv_indev_set_type(ms, LV_INDEV_TYPE_POINTER);
lv_indev_set_read_cb(ms, hidHostMouseReadCb);
auto* cur = lv_image_create(lv_layer_sys());
lv_obj_remove_flag(cur, LV_OBJ_FLAG_CLICKABLE);
lv_obj_add_flag(cur, LV_OBJ_FLAG_HIDDEN);
lv_image_set_src(cur, TT_ASSETS_UI_CURSOR);
lv_indev_set_cursor(ms, cur);
hid_host_ctx->mouseIndev = ms;
hid_host_ctx->mouseCursor = cur;
tt::lvgl::unlock();
LOGGER.info("Mouse indev registered");
});
}
}
static void hidHostHandleMouseReport(const uint8_t* data, uint16_t len) {
hidHostHandleMouseReportInternal(data, len, 0);
}
// ---- Asynchronous coordination helpers ----
static void hidHostOnDscsDiscovered(HidHostCtx& ctx) {
ctx.dscsDiscovered = true;
if (ctx.encrypted) {
ctx.rptRefReadIdx = 0;
hidHostStartRptRefRead(ctx);
} else {
LOGGER.info("Descriptors discovered, waiting for encryption");
}
}
static void hidHostOnEncrypted(HidHostCtx& ctx) {
ctx.encrypted = true;
if (ctx.dscsDiscovered) {
ctx.rptRefReadIdx = 0;
hidHostStartRptRefRead(ctx);
} else {
LOGGER.info("Encryption established, waiting for descriptor discovery");
}
}
// ---- Timer callback for post-encryption CCCD retry ----
static void hidEncRetryTimerCb(void* /*arg*/) {
if (hid_host_ctx) {
LOGGER.info("CCCD delay complete — starting subscriptions");
hidHostSubscribeNext(*hid_host_ctx);
}
}
// ---- Report Map parsing ----
static void applyReportMapTypes(HidHostCtx& ctx) {
const uint8_t* data = ctx.rptMap.data();
size_t len = ctx.rptMap.size();
uint16_t usagePage = 0, usage = 0;
uint8_t reportId = 0;
int depth = 0;
HidReportType collType = HidReportType::Unknown;
struct Entry { uint8_t id; HidReportType type; };
std::vector<Entry> typeMap;
std::vector<HidReportType> collOrder;
bool collHadInput = false;
size_t i = 0;
while (i < len) {
uint8_t prefix = data[i++];
if (prefix == 0xFE) {
if (i + 1 >= len) break;
uint8_t lsz = data[i++]; i++; i += lsz; continue;
}
uint8_t bSize = prefix & 0x03;
uint8_t bType = (prefix >> 2) & 0x03;
uint8_t bTag = (prefix >> 4) & 0x0F;
uint8_t dataLen = (bSize == 3) ? 4 : bSize;
if (i + dataLen > len) break;
uint32_t value = 0;
for (uint8_t j = 0; j < dataLen; j++) value |= (uint32_t)data[i++] << (8 * j);
if (bType == 0) {
if (bTag == 0xA) {
if (depth == 0 && value == 0x01) {
if (usagePage == 0x01 && usage == 0x06) collType = HidReportType::Keyboard;
else if (usagePage == 0x01 && usage == 0x02) collType = HidReportType::Mouse;
else if (usagePage == 0x0C) collType = HidReportType::Consumer;
else collType = HidReportType::Unknown;
collHadInput = false;
}
depth++; usage = 0;
} else if (bTag == 0xC) {
if (depth > 0) depth--;
if (depth == 0) { collType = HidReportType::Unknown; collHadInput = false; }
usage = 0;
} else if (bTag == 0x8) {
if (depth > 0 && collType != HidReportType::Unknown) {
if (!collHadInput) { collOrder.push_back(collType); collHadInput = true; }
if (reportId != 0) {
bool found = false;
for (const auto& e : typeMap) { if (e.id == reportId) { found = true; break; } }
if (!found) typeMap.push_back({reportId, collType});
}
}
usage = 0;
} else { usage = 0; }
} else if (bType == 1) {
if (bTag == 0x0) usagePage = (uint16_t)value;
else if (bTag == 0x8) reportId = (uint8_t)value;
} else if (bType == 2) {
if (bTag == 0x0) usage = (uint16_t)value;
}
}
bool anyNonZeroId = false;
for (const auto& rpt : ctx.inputRpts) { if (rpt.reportId != 0) { anyNonZeroId = true; break; } }
size_t zeroRptIdx = 0;
for (auto& rpt : ctx.inputRpts) {
if (anyNonZeroId) {
for (const auto& e : typeMap) { if (e.id == rpt.reportId) { rpt.type = e.type; break; } }
} else {
if (zeroRptIdx < collOrder.size()) rpt.type = collOrder[zeroRptIdx];
zeroRptIdx++;
}
LOGGER.info("Report val_handle={} reportId={} type={}", rpt.valHandle, rpt.reportId, (int)rpt.type);
}
ctx.rptMap.clear();
}
// ---- Report Reference read chain ----
static void hidHostStartRptRefRead(HidHostCtx& ctx) {
while (ctx.rptRefReadIdx < (int)ctx.inputRpts.size() &&
ctx.inputRpts[ctx.rptRefReadIdx].rptRefHandle == 0) {
ctx.rptRefReadIdx++;
}
if (ctx.rptRefReadIdx >= (int)ctx.inputRpts.size()) {
hidHostReadReportMap(ctx);
return;
}
uint16_t handle = ctx.inputRpts[ctx.rptRefReadIdx].rptRefHandle;
int rc = ble_gattc_read(ctx.connHandle, handle, [](uint16_t conn_handle,
const struct ble_gatt_error* error,
struct ble_gatt_attr* attr, void* /*arg*/) -> int {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
if (conn_handle != ctx.connHandle) return 0;
if (error->status == BLE_HS_EDONE) return 0;
if (error->status == 0 && attr != nullptr) {
if (OS_MBUF_PKTLEN(attr->om) >= 2 && ctx.rptRefReadIdx < (int)ctx.inputRpts.size()) {
uint8_t rpt_ref[2] = {};
os_mbuf_copydata(attr->om, 0, 2, rpt_ref);
ctx.inputRpts[ctx.rptRefReadIdx].reportId = rpt_ref[0];
LOGGER.info("Report[{}] val_handle={} reportId={}", ctx.rptRefReadIdx,
ctx.inputRpts[ctx.rptRefReadIdx].valHandle, rpt_ref[0]);
}
}
ctx.rptRefReadIdx++;
hidHostStartRptRefRead(ctx);
return 0;
}, nullptr);
if (rc != 0) {
LOGGER.warn("rptRef read[{}] failed rc={} — skipping", ctx.rptRefReadIdx, rc);
ctx.rptRefReadIdx++;
hidHostStartRptRefRead(ctx);
}
}
// ---- Report Map read ----
static void hidHostReadReportMap(HidHostCtx& ctx) {
if (ctx.rptMapHandle == 0) {
LOGGER.info("No Report Map char — skipping type resolution");
ctx.typeResolutionDone = true;
ctx.subscribeIdx = 0;
if (hid_enc_retry_timer) {
esp_timer_stop(hid_enc_retry_timer);
esp_timer_start_once(hid_enc_retry_timer, 500 * 1000);
} else {
hidHostSubscribeNext(ctx);
}
return;
}
int rc = ble_gattc_read_long(ctx.connHandle, ctx.rptMapHandle, 0,
[](uint16_t conn_handle, const struct ble_gatt_error* error,
struct ble_gatt_attr* attr, void* /*arg*/) -> int {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
if (conn_handle != ctx.connHandle) return 0;
if (error->status == 0 && attr != nullptr) {
uint16_t chunk = OS_MBUF_PKTLEN(attr->om);
size_t old_sz = ctx.rptMap.size();
ctx.rptMap.resize(old_sz + chunk);
os_mbuf_copydata(attr->om, 0, chunk, ctx.rptMap.data() + old_sz);
return 0;
}
if (!ctx.rptMap.empty()) {
LOGGER.info("Report map read ({} bytes)", ctx.rptMap.size());
applyReportMapTypes(ctx);
} else {
LOGGER.warn("Report map read failed — types remain Unknown");
}
ctx.typeResolutionDone = true;
ctx.subscribeIdx = 0;
LOGGER.info("Type resolution complete — delaying CCCD subscriptions by 500ms");
if (hid_enc_retry_timer) {
esp_timer_stop(hid_enc_retry_timer);
esp_timer_start_once(hid_enc_retry_timer, 500 * 1000);
} else {
hidHostSubscribeNext(ctx);
}
return 0;
}, nullptr);
if (rc != 0) {
LOGGER.warn("Report map read_long failed rc={} — skipping", rc);
ctx.typeResolutionDone = true;
ctx.subscribeIdx = 0;
if (hid_enc_retry_timer) {
esp_timer_stop(hid_enc_retry_timer);
esp_timer_start_once(hid_enc_retry_timer, 500 * 1000);
} else {
hidHostSubscribeNext(ctx);
}
}
}
// ---- CCCD subscription chain ----
static int hidHostCccdWriteCb(uint16_t conn_handle, const struct ble_gatt_error* error,
struct ble_gatt_attr* /*attr*/, void* /*arg*/) {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
if (conn_handle != ctx.connHandle) return 0;
if (error->status != 0 && error->status != BLE_HS_EDONE) {
if ((error->status == BLE_HS_ATT_ERR(BLE_ATT_ERR_INSUFFICIENT_AUTHEN) ||
error->status == BLE_HS_ATT_ERR(BLE_ATT_ERR_INSUFFICIENT_ENC))
&& !ctx.securityInitiated) {
LOGGER.info("CCCD auth required — initiating security");
ctx.securityInitiated = true;
ble_gap_security_initiate(conn_handle);
return 0;
}
if (error->status == BLE_HS_ETIMEOUT) {
LOGGER.warn("CCCD write timed out for report[{}] — skipping", ctx.subscribeIdx);
ctx.subscribeIdx++;
hidHostSubscribeNext(ctx);
return 0;
}
if (error->status == BLE_HS_ENOTCONN) {
LOGGER.warn("CCCD write failed — not connected");
return 0;
}
LOGGER.warn("CCCD write failed status={}", error->status);
}
ctx.subscribeIdx++;
hidHostSubscribeNext(ctx);
return 0;
}
static void hidHostSubscribeNext(HidHostCtx& ctx) {
if (ctx.subscribeIdx >= (int)ctx.inputRpts.size()) {
if (ctx.readyBlockFired) {
LOGGER.info("Subscribe ready block already ran — ignoring duplicate");
return;
}
ctx.readyBlockFired = true;
LOGGER.info("All {} reports subscribed — ready", ctx.inputRpts.size());
if (hid_enc_retry_timer) esp_timer_stop(hid_enc_retry_timer);
if (!hid_host_key_queue) {
hid_host_key_queue = xQueueCreate(HID_HOST_KEY_QUEUE_SIZE, sizeof(HidHostKeyEvt));
}
getMainDispatcher().dispatch([] {
if (!hid_host_ctx || hid_host_ctx->kbIndev != nullptr) return;
bool has_keyboard = false;
for (const auto& rpt : hid_host_ctx->inputRpts) {
if (rpt.type == HidReportType::Keyboard || rpt.type == HidReportType::Unknown) {
has_keyboard = true;
break;
}
}
if (!has_keyboard) {
LOGGER.info("No keyboard reports found — skipping keyboard indev registration");
return;
}
if (!tt::lvgl::lock(1000)) { LOGGER.warn("LVGL lock failed for kb indev"); return; }
auto* kb = lv_indev_create();
lv_indev_set_type(kb, LV_INDEV_TYPE_KEYPAD);
lv_indev_set_read_cb(kb, hidHostKeyboardReadCb);
hid_host_ctx->kbIndev = kb;
tt::lvgl::hardware_keyboard_set_indev(kb);
tt::lvgl::unlock();
LOGGER.info("Keyboard indev registered");
});
auto peer_addr = ctx.peerAddr;
getMainDispatcher().dispatch([peer_addr] {
// Find name from cached scan results
std::string name;
{
auto results = getScanResults();
for (const auto& r : results) {
if (r.addr == peer_addr) { name = r.name; break; }
}
}
settings::PairedDevice device;
device.addr = peer_addr;
device.profileId = BT_PROFILE_HID_HOST;
device.autoConnect = true;
const auto addr_hex = settings::addrToHex(peer_addr);
settings::PairedDevice existing;
if (settings::load(addr_hex, existing)) {
device.autoConnect = existing.autoConnect;
}
device.name = name;
settings::save(device);
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) {
BtEvent e = {};
e.type = BT_EVENT_PROFILE_STATE_CHANGED;
e.profile_state.state = BT_PROFILE_STATE_CONNECTED;
e.profile_state.profile = BT_PROFILE_HID_HOST;
bluetooth_fire_event(dev, e);
}
});
return;
}
auto& rpt = ctx.inputRpts[ctx.subscribeIdx];
if (rpt.cccdHandle == 0) {
ctx.subscribeIdx++;
hidHostSubscribeNext(ctx);
return;
}
static const uint16_t notify_val = 0x0001;
int rc = ble_gattc_write_flat(ctx.connHandle, rpt.cccdHandle,
&notify_val, sizeof(notify_val),
hidHostCccdWriteCb, nullptr);
if (rc != 0) {
LOGGER.warn("gattc_write_flat CCCD failed rc={}", rc);
ctx.subscribeIdx++;
hidHostSubscribeNext(ctx);
}
}
// ---- Descriptor discovery ----
static int hidHostDscDiscCb(uint16_t conn_handle, const struct ble_gatt_error* error,
uint16_t chr_val_handle, const struct ble_gatt_dsc* dsc, void* /*arg*/) {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
if (conn_handle != ctx.connHandle) return 0;
if (error->status == 0 && dsc != nullptr) {
uint16_t dsc_uuid = ble_uuid_u16(&dsc->uuid.u);
for (auto& rpt : ctx.inputRpts) {
if (rpt.valHandle != chr_val_handle) continue;
if (dsc_uuid == 0x2902) { rpt.cccdHandle = dsc->handle; }
else if (dsc_uuid == 0x2908) { rpt.rptRefHandle = dsc->handle; }
break;
}
} else if (error->status == BLE_HS_EDONE) {
int next_idx = ctx.dscDiscIdx + 1;
if (next_idx < (int)ctx.inputRpts.size()) {
ctx.dscDiscIdx = next_idx;
auto& next_rpt = ctx.inputRpts[next_idx];
uint16_t end = getDescEndHandle(ctx, next_rpt.valHandle);
int rc = ble_gattc_disc_all_dscs(ctx.connHandle, next_rpt.valHandle, end,
hidHostDscDiscCb, nullptr);
if (rc != 0) {
LOGGER.warn("disc_all_dscs[{}] failed rc={}", next_idx, rc);
hidHostOnDscsDiscovered(ctx);
}
} else {
hidHostOnDscsDiscovered(ctx);
}
}
return 0;
}
static uint16_t getDescEndHandle(const HidHostCtx& ctx, uint16_t valHandle) {
for (uint16_t dh : ctx.allChrDefHandles) {
if (dh > valHandle) return dh - 1;
}
return ctx.hidSvcEnd;
}
// ---- Characteristic discovery ----
static int hidHostChrDiscCb(uint16_t conn_handle, const struct ble_gatt_error* error,
const struct ble_gatt_chr* chr, void* /*arg*/) {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
if (conn_handle != ctx.connHandle) return 0;
if (error->status == 0 && chr != nullptr) {
ctx.allChrDefHandles.push_back(chr->def_handle);
uint16_t uuid16 = ble_uuid_u16(&chr->uuid.u);
if (uuid16 == 0x2A4D && (chr->properties & BLE_GATT_CHR_PROP_NOTIFY)) {
HidHostInputRpt rpt = {};
rpt.valHandle = chr->val_handle;
ctx.inputRpts.push_back(rpt);
LOGGER.info("Input Report chr val_handle={}", chr->val_handle);
} else if (uuid16 == 0x2A4B) {
ctx.rptMapHandle = chr->val_handle;
}
} else if (error->status == BLE_HS_EDONE) {
std::sort(ctx.allChrDefHandles.begin(), ctx.allChrDefHandles.end());
if (ctx.inputRpts.empty()) {
LOGGER.warn("No Input Report chars — disconnecting");
ble_gap_terminate(ctx.connHandle, BLE_ERR_REM_USER_CONN_TERM);
return 0;
}
ctx.dscDiscIdx = 0;
auto& first = ctx.inputRpts[0];
uint16_t end = getDescEndHandle(ctx, first.valHandle);
int rc = ble_gattc_disc_all_dscs(ctx.connHandle, first.valHandle, end,
hidHostDscDiscCb, nullptr);
if (rc != 0) {
LOGGER.warn("disc_all_dscs[0] failed rc={}", rc);
hidHostOnDscsDiscovered(ctx);
}
}
return 0;
}
// ---- Service discovery ----
static int hidHostSvcDiscCb(uint16_t conn_handle, const struct ble_gatt_error* error,
const struct ble_gatt_svc* svc, void* /*arg*/) {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
if (conn_handle != ctx.connHandle) return 0;
if (error->status == 0 && svc != nullptr) {
if (ble_uuid_u16(&svc->uuid.u) == 0x1812) {
ctx.hidSvcStart = svc->start_handle;
ctx.hidSvcEnd = svc->end_handle;
LOGGER.info("HID service start={} end={}", ctx.hidSvcStart, ctx.hidSvcEnd);
}
} else if (error->status == BLE_HS_EDONE) {
if (ctx.hidSvcStart == 0) {
LOGGER.warn("No HID service found — disconnecting");
ble_gap_terminate(ctx.connHandle, BLE_ERR_REM_USER_CONN_TERM);
return 0;
}
int rc = ble_gattc_disc_all_chrs(ctx.connHandle, ctx.hidSvcStart, ctx.hidSvcEnd,
hidHostChrDiscCb, nullptr);
if (rc != 0) {
LOGGER.warn("disc_all_chrs failed rc={}", rc);
ble_gap_terminate(ctx.connHandle, BLE_ERR_REM_USER_CONN_TERM);
}
}
return 0;
}
// ---- GAP callback for HID host central connection ----
static int hidHostGapCb(struct ble_gap_event* event, void* /*arg*/) {
if (!hid_host_ctx) return 0;
auto& ctx = *hid_host_ctx;
switch (event->type) {
case BLE_GAP_EVENT_CONNECT:
if (event->connect.status == 0) {
ctx.connHandle = event->connect.conn_handle;
LOGGER.info("Connected (handle={})", ctx.connHandle);
// Initiate security immediately to encrypt the link for HOGP (HID over GATT)
ble_gap_security_initiate(ctx.connHandle);
ctx.securityInitiated = true;
int rc = ble_gattc_disc_all_svcs(ctx.connHandle, hidHostSvcDiscCb, nullptr);
if (rc != 0) {
LOGGER.warn("disc_all_svcs failed rc={}", rc);
ble_gap_terminate(ctx.connHandle, BLE_ERR_REM_USER_CONN_TERM);
}
} else {
LOGGER.warn("Connect failed status={}", event->connect.status);
hid_host_ctx.reset();
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) {
bluetooth_set_hid_host_active(dev, false);
struct BtEvent e = {};
e.type = BT_EVENT_PROFILE_STATE_CHANGED;
e.profile_state.state = BT_PROFILE_STATE_IDLE;
e.profile_state.profile = BT_PROFILE_HID_HOST;
bluetooth_fire_event(dev, e);
}
}
break;
case BLE_GAP_EVENT_DISCONNECT: {
LOGGER.info("Disconnected reason={}", event->disconnect.reason);
lv_indev_t* saved_kb = hid_host_ctx ? hid_host_ctx->kbIndev : nullptr;
lv_indev_t* saved_mouse = hid_host_ctx ? hid_host_ctx->mouseIndev : nullptr;
lv_obj_t* saved_cursor = hid_host_ctx ? hid_host_ctx->mouseCursor : nullptr;
QueueHandle_t saved_queue = hid_host_key_queue;
hid_host_ctx.reset();
hid_host_key_queue = nullptr;
std::memset(hid_host_prev_keys, 0, sizeof(hid_host_prev_keys));
hid_host_mouse_x.store(0);
hid_host_mouse_y.store(0);
hid_host_mouse_btn.store(false);
hid_host_mouse_active.store(false);
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) {
bluetooth_set_hid_host_active(dev, false);
struct BtEvent e = {};
e.type = BT_EVENT_PROFILE_STATE_CHANGED;
e.profile_state.state = BT_PROFILE_STATE_IDLE;
e.profile_state.profile = BT_PROFILE_HID_HOST;
bluetooth_fire_event(dev, e);
}
getMainDispatcher().dispatch([saved_kb, saved_mouse, saved_cursor, saved_queue] {
if (!tt::lvgl::lock(1000)) {
LOGGER.warn("Failed to acquire LVGL lock for indev cleanup");
if (saved_queue) vQueueDelete(saved_queue);
return;
}
if (saved_kb) {
tt::lvgl::hardware_keyboard_set_indev(nullptr);
lv_indev_delete(saved_kb);
}
if (saved_mouse) lv_indev_delete(saved_mouse);
if (saved_cursor) lv_obj_delete(saved_cursor);
tt::lvgl::unlock();
if (saved_queue) vQueueDelete(saved_queue);
});
break;
}
case BLE_GAP_EVENT_ENC_CHANGE:
if (event->enc_change.conn_handle == ctx.connHandle) {
if (event->enc_change.status == 0) {
LOGGER.info("Encryption established — notifying state machine");
hidHostOnEncrypted(ctx);
} else {
LOGGER.warn("Encryption failed status={}", event->enc_change.status);
}
}
break;
case BLE_GAP_EVENT_NOTIFY_RX:
if (event->notify_rx.conn_handle == ctx.connHandle) {
uint16_t len = OS_MBUF_PKTLEN(event->notify_rx.om);
if (len > 0 && len <= 64) {
uint8_t buf[64] = {};
os_mbuf_copydata(event->notify_rx.om, 0, len, buf);
for (const auto& rpt : ctx.inputRpts) {
if (rpt.valHandle != event->notify_rx.attr_handle) continue;
// Pass reportId so handlers can strip leading ID byte when needed
// (combo keyboard/mouse devices like Fosmon B00BX0YKX4 often include ID)
switch (rpt.type) {
case HidReportType::Keyboard:
hidHostHandleKeyboardReportInternal(buf, len, rpt.reportId);
break;
case HidReportType::Mouse:
hidHostHandleMouseReportInternal(buf, len, rpt.reportId);
break;
case HidReportType::Consumer:
LOGGER.info("Consumer report len={}", len);
break;
case HidReportType::Unknown: {
// Unknown type: use length + heuristic. For combo devices
// where reportId identifies type, trust reportId if non-zero.
// Also trust buffer length: keyboard is typically 8 bytes
// (mod+reserved+6keys) possibly with ID -> 9.
// Mouse is 3-5 bytes.
if (rpt.reportId != 0) {
// If we have a Report Map type parsed later, we may not yet
// know type here. Make educated guess from len excluding ID.
uint16_t effective_len = len;
if (len >= 1 && buf[0] == rpt.reportId) effective_len = len - 1;
if (effective_len >= 8 || effective_len == 6) {
hidHostHandleKeyboardReportInternal(buf, len, rpt.reportId);
} else if (effective_len >= 3) {
hidHostHandleMouseReportInternal(buf, len, rpt.reportId);
}
} else {
if (len >= 6) hidHostHandleKeyboardReport(buf, len);
else if (len >= 3) hidHostHandleMouseReport(buf, len);
}
break;
}
}
break;
}
}
}
break;
default:
break;
}
return 0;
}
// ---- Public functions ----
static esp_timer_handle_t hid_autoconn_retry_timer = nullptr;
static int hid_autoconn_empty_scan_count = 0;
static constexpr int HID_AUTOCONN_DIRECT_AFTER = 1; // after N empty scans, try direct connect without seeing advert
static constexpr int HID_AUTOCONN_MAX_FAST = 20; // ~60s @ 3s interval
static constexpr int HID_AUTOCONN_MAX_TOTAL = 100; // then backoff longer but keep trying
static void ensureAutoConnTimer() {
if (hid_autoconn_retry_timer != nullptr) return;
esp_timer_create_args_t args = {};
args.callback = [](void* /*arg*/) {
LOGGER.info("Auto-connect retry timer fired (empty_scans={})", hid_autoconn_empty_scan_count);
if (hidHostIsConnected()) {
hid_autoconn_empty_scan_count = 0;
return;
}
// If not already scanning, start a scan; autoConnectHidHost() will be called
// on SCAN_FINISHED via bt_event_bridge.
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) {
if (!bluetooth_is_scanning(dev)) {
bluetooth_scan_start(dev);
}
}
// Keep periodic retry even if we are scanning - as fallback
// The timer will be re-armed in autoConnectHidHost()
};
args.dispatch_method = ESP_TIMER_TASK;
args.name = "hid_autoconn_retry";
if (esp_timer_create(&args, &hid_autoconn_retry_timer) != ESP_OK) {
LOGGER.error("Failed to create hid_autoconn_retry timer");
hid_autoconn_retry_timer = nullptr;
}
}
void hidHostConnect(const std::array<uint8_t, 6>& addr) {
if (getRadioState() != RadioState::On) {
LOGGER.warn("hidHostConnect: radio not on");
return;
}
if (hid_host_ctx) {
LOGGER.warn("hidHostConnect: already connecting/connected");
return;
}
hid_host_mouse_x.store(0);
hid_host_mouse_y.store(0);
hid_host_mouse_btn.store(false);
hid_host_mouse_active.store(false);
hid_host_ctx = std::make_unique<HidHostCtx>();
hid_host_ctx->peerAddr = addr;
// Create timers lazily
if (hid_enc_retry_timer == nullptr) {
esp_timer_create_args_t args = {};
args.callback = hidEncRetryTimerCb;
args.dispatch_method = ESP_TIMER_TASK;
args.name = "hid_enc_retry";
if (esp_timer_create(&args, &hid_enc_retry_timer) != ESP_OK) {
LOGGER.error("Failed to create hid_enc_retry timer");
hid_enc_retry_timer = nullptr;
}
}
ensureAutoConnTimer();
// Cancel any pending auto-connect retry (we are connecting now)
if (hid_autoconn_retry_timer) esp_timer_stop(hid_autoconn_retry_timer);
hid_autoconn_empty_scan_count = 0;
// Notify driver that a HID host central connection is starting.
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) bluetooth_set_hid_host_active(dev, true);
// Look up the addr_type from the cached scan results. Bonded devices may
// advertise with RPA (random) or public; cache now includes nameless adverts
// so we usually have it. Fall back to trying both types.
ble_addr_t ble_addr = {};
ble_addr.type = BLE_ADDR_PUBLIC;
std::memcpy(ble_addr.val, addr.data(), 6);
uint8_t addr_type = 0;
if (getCachedScanAddrType(addr.data(), &addr_type)) {
ble_addr.type = addr_type;
LOGGER.info("hidHostConnect: using addr_type={} from scan cache", addr_type);
} else {
LOGGER.info("hidHostConnect: addr_type unknown, will try PUBLIC then RANDOM");
}
uint8_t own_addr_type;
if (ble_hs_id_infer_auto(0, &own_addr_type) != 0) {
own_addr_type = BLE_OWN_ADDR_PUBLIC;
}
int rc = ble_gap_connect(own_addr_type, &ble_addr, 8000, nullptr, hidHostGapCb, nullptr);
if (rc != 0 && ble_addr.type == BLE_ADDR_PUBLIC) {
// Common fail: device actually uses RANDOM (RPA). Retry with RANDOM.
LOGGER.info("ble_gap_connect PUBLIC failed rc={}, retrying RANDOM", rc);
ble_addr.type = BLE_ADDR_RANDOM;
rc = ble_gap_connect(own_addr_type, &ble_addr, 8000, nullptr, hidHostGapCb, nullptr);
}
if (rc != 0 && ble_addr.type == BLE_ADDR_RANDOM) {
// Try PUBLIC again if RANDOM was first (or both failed, we already tried public)
// Only if we originally had a cached RANDOM type, try PUBLIC now.
if (addr_type == BLE_ADDR_RANDOM) {
LOGGER.info("ble_gap_connect RANDOM failed rc={}, retrying PUBLIC", rc);
ble_addr.type = BLE_ADDR_PUBLIC;
rc = ble_gap_connect(own_addr_type, &ble_addr, 8000, nullptr, hidHostGapCb, nullptr);
}
}
if (rc != 0) {
LOGGER.warn("ble_gap_connect failed rc={}", rc);
hid_host_ctx.reset();
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) {
bluetooth_set_hid_host_active(dev, false);
// Fire IDLE so bt_event_bridge can start a new scan and retry.
BtEvent e = {};
e.type = BT_EVENT_PROFILE_STATE_CHANGED;
e.profile_state.state = BT_PROFILE_STATE_IDLE;
e.profile_state.profile = BT_PROFILE_HID_HOST;
bluetooth_fire_event(dev, e);
}
} else {
LOGGER.info("Connecting... addr_type={}", (int)ble_addr.type);
}
}
void hidHostDisconnect() {
if (!hid_host_ctx || hid_host_ctx->connHandle == BLE_HS_CONN_HANDLE_NONE) return;
ble_gap_terminate(hid_host_ctx->connHandle, BLE_ERR_REM_USER_CONN_TERM);
}
bool hidHostIsConnected() {
return hid_host_ctx != nullptr &&
hid_host_ctx->connHandle != BLE_HS_CONN_HANDLE_NONE &&
!hid_host_ctx->inputRpts.empty() &&
hid_host_ctx->subscribeIdx >= (int)hid_host_ctx->inputRpts.size();
}
bool hidHostGetConnectedPeer(std::array<uint8_t, 6>& addr_out) {
if (!hidHostIsConnected()) return false;
addr_out = hid_host_ctx->peerAddr;
return true;
}
void autoConnectHidHost() {
if (hidHostIsConnected()) return;
ensureAutoConnTimer();
// Phase 1: connect if we saw it in last scan (preferred: we have fresh addr_type + RSSI)
auto scan = getScanResults();
for (const auto& r : scan) {
settings::PairedDevice stored;
if (settings::load(settings::addrToHex(r.addr), stored) &&
stored.autoConnect &&
stored.profileId == BT_PROFILE_HID_HOST) {
LOGGER.info("Auto-connecting HID host to {} (name='{}' rssi={}) [from scan]",
settings::addrToHex(r.addr), r.name, (int)r.rssi);
hidHostConnect(r.addr);
return;
}
}
// Phase 2: not in scan. Keep trying.
// This handles boot timing: keyboard may be off, asleep, or using RPA that we
// haven't cached yet. We need to:
// a) keep scanning periodically so we eventually see wake-up adv
// b) after a few empty scans, try DIRECT connect to bonded address — NimBLE
// can often connect via directed connection even if not currently advertising,
// using the bond store, or it will start scanning internally.
auto peers = settings::loadAll();
bool found_auto_peer = false;
std::array<uint8_t, 6> direct_addr = {};
for (const auto& peer : peers) {
if (peer.autoConnect && peer.profileId == BT_PROFILE_HID_HOST) {
found_auto_peer = true;
direct_addr = peer.addr;
break; // take first
}
}
if (!found_auto_peer) {
// No autoConnect peers at all — stop retry timer
if (hid_autoconn_retry_timer) esp_timer_stop(hid_autoconn_retry_timer);
hid_autoconn_empty_scan_count = 0;
return;
}
hid_autoconn_empty_scan_count++;
if (hid_autoconn_empty_scan_count >= HID_AUTOCONN_DIRECT_AFTER) {
// Try direct connect to saved peer, even though it wasn't in scan.
// hidHostConnect() will attempt both PUBLIC and RANDOM addr types.
// This is crucial for after reboot where keyboard may be bonded but not
// currently advertising in our 5s window, or cache was cleared on SCAN_STARTED.
// We only attempt direct every few scans to avoid tight connect loops.
if (hid_autoconn_empty_scan_count % 2 == 1 || hid_autoconn_empty_scan_count <= HID_AUTOCONN_DIRECT_AFTER+1) {
LOGGER.info("Auto-connect HID host: device not seen after {} scans, trying direct to {}",
hid_autoconn_empty_scan_count, settings::addrToHex(direct_addr));
hidHostConnect(direct_addr);
return;
}
}
// Not yet at direct-connect threshold, or direct failed last time — keep scanning
if (Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE)) {
if (!bluetooth_is_scanning(dev)) {
LOGGER.info("Auto-connect HID host: device not in scan (attempt {}/{}), retrying scan",
hid_autoconn_empty_scan_count, HID_AUTOCONN_DIRECT_AFTER);
bluetooth_scan_start(dev);
}
}
// Schedule next retry
uint64_t delay_us = 3 * 1000 * 1000ULL; // 3s fast phase
if (hid_autoconn_empty_scan_count >= HID_AUTOCONN_MAX_FAST) {
delay_us = 10 * 1000 * 1000ULL; // 10s after 60s
if (hid_autoconn_empty_scan_count >= HID_AUTOCONN_MAX_TOTAL) {
delay_us = 30 * 1000 * 1000ULL; // 30s after 5min, keep trying forever but slow
}
}
if (hid_autoconn_retry_timer) {
esp_timer_stop(hid_autoconn_retry_timer);
esp_timer_start_once(hid_autoconn_retry_timer, delay_us);
}
}
} // namespace tt::bluetooth
#endif // CONFIG_BT_NIMBLE_ENABLED
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