BLE CRC error

[DamianJeu]

Hi, Im in the process of porting bluetooth to esp32, my device is detected by the tuya app, currently it stops at crc after receiving the first frame. For example, the frame I received: 0x00.0x31.0x40.0x01.0xA4.0x62.0xD5.0x33.0x09.0x56.0xC4.0xF5.0x1B,0xBB,0x3C,0xF7.0xBB,0xEA, 0x38.0x86.0x32.0xF8.0x94.0x84.0xCF,0xDA,0x1F,0x3C,0x5B,0xF3,0x33.0x16.0xEF,0x9F,0xA5,0xD5, 0x24.0xBE,0x0B,0x8F,0x20.0x9C,0x06.0xA3.0xCD,0x47.0xCB,0xD1.0x1A,0xA7.0x26.0x47 Each time is 52 bytes. I get an error: 00:00:17 ERROR tuya_ble_service.c:467: receive data crc16 check fail 00:00:17 ERROR tuya_ble_service.c:791: ret:-1 Is anyone able to help me?

[xmow49]

Im in the process of porting bluetooth to esp32

Hi, do you have published your code? I'm also interested in the BLE on the ESP32. Can I have the beginning of your code to test and maybe improve it ? Thanks

[shiliu-yang]

For tuya Wifi provisioning for esp32, you can refer to this: https://github.com/tuya/tuya-connect-kit-for-mqtt-embedded-c/issues/107#issuecomment-1763612500

[DamianJeu]

In my case, the problem was with endianness in the tuya_cloudtypes.h file. Im swapping the bit order in the "UNI" macros.

[shiliu-yang]

In my case, the problem was with endianness in the tuya_cloudtypes.h file. Im swapping the bit order in the "UNI" macros.

You need to configure the -DLITTLE_ENDIAN=1 or -DLITTLE_ENDIAN=0 compile option depending on your chip platform at compile time.

https://github.com/tuya/tuya-connect-kit-for-mqtt-embedded-c/blob/642ead7acef194ab53c6784c8045211394fe6177/CMakeLists.txt#L20C35-L20C35

Or you can define it yourself in the code

[DamianJeu]

In my case, the problem was with endianness in the tuya_cloudtypes.h file. Im swapping the bit order in the "UNI" macros.

You need to configure the -DLITTLE_ENDIAN=1 or -DLITTLE_ENDIAN=0 compile option depending on your chip platform at compile time.

https://github.com/tuya/tuya-connect-kit-for-mqtt-embedded-c/blob/642ead7acef194ab53c6784c8045211394fe6177/CMakeLists.txt#L20C35-L20C35

Or you can define it yourself in the code

I created my own definition in code, but your solution i think is more universal

[toyokomi]

Hello @shiliu-yang thank you for your code. Right now I have problem because after receiving data there is information that CRC16 has failed. I am not sure but I am using UUID different that you have in your implementation. ESP32 is little endian by default so there is no need to change it. How can I get UUID for device? I think there is a problem so CRC16 is failing. From Tuya knowledge base there is difference between device ID and UUID. I am using Tuyalink based solution.

[DamianJeu]

If you use tuyalink it wont work. This solution is for tuyaOS, then in hardware development you need to use linkSDK (tuya website). if u want use tuyaLink -> https://github.com/tuya/tuya-iot-core-sdk