BLECharacteristic.cpp ESP_GATTS_WRITE_EVT param->write.is_prep #7960
Description
Board
ESP32-S3-DevKitC-1U
Device Description
ESP32-S3-DevKitC-1U
Hardware Configuration
Nothing Connected
Version
latest master (checkout manually)
IDE Name
Arduino IDE
Operating System
Windows 10
Flash frequency
80 MHz
PSRAM enabled
no
Upload speed
921600
Description
I used the BLE_write.ino example.
I tried to send Values from the BLE Scanner App to the ESP32 but only seen my values when I turned on Core Debug Level "Debug" via the debug output.
The onWrite() Callback was never reached.
I had to remove the if (param->write.is_prep) from the ESP_GATTS_WRITE_EVT to get it working again.
Seams like the write.is_prep is the Problem
Sketch
case ESP_GATTS_WRITE_EVT: {
// We check if this write request is for us by comparing the handles in the event. If it is for us
// we save the new value. Next we look at the need_rsp flag which indicates whether or not we need
// to send a response. If we do, then we formulate a response and send it.
if (param->write.handle == m_handle) {
setValue(param->write.value, param->write.len);
log_d(" - Response to write event: New value: handle: %.2x, uuid: %s",
getHandle(), getUUID().toString().c_str());
char* pHexData = BLEUtils::buildHexData(nullptr, param->write.value, param->write.len);
log_d(" - Data: length: %d, data: %s", param->write.len, pHexData);
free(pHexData);
if (param->write.need_rsp) {
esp_gatt_rsp_t rsp;
rsp.attr_value.len = param->write.len;
rsp.attr_value.handle = m_handle;
rsp.attr_value.offset = param->write.offset;
rsp.attr_value.auth_req = ESP_GATT_AUTH_REQ_NONE;
memcpy(rsp.attr_value.value, param->write.value, param->write.len);
esp_err_t errRc = ::esp_ble_gatts_send_response(
gatts_if,
param->write.conn_id,
param->write.trans_id, ESP_GATT_OK, &rsp);
if (errRc != ESP_OK) {
log_e("esp_ble_gatts_send_response: rc=%d %s", errRc, GeneralUtils::errorToString(errRc));
}
} // Response needed
m_pCallbacks->onWrite(this, param);
} // Match on handles.
break;
} // ESP_GATTS_WRITE_EVTDebug Message
[492499][D][BLEDevice.cpp:102] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_WRITE_EVT
[492500][D][BLECharacteristic.cpp:292] handleGATTServerEvent(): - Response to write event: New value: handle: 2a, uuid: beb5483e-36e1-4688-b7f5-ea07361b26a8
[492513][D][BLECharacteristic.cpp:295] handleGATTServerEvent(): - Data: length: 4, data: 54657374
*********
New value: Test
*********
[492533][D][BLEDevice.cpp:102] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_RESPONSE_EVT
Other Steps to Reproduce
Flash the BLE_write.ino
Connect to the Device with the BLE Scanner APP
Write values to the Device
OnWrite() will never be called
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.