Tuya WXU XR806 from TRV Heater Device flashing, SDK, firmware change research

The discussion centers on the Tuya WXU module, specifically the XR806 SoC used in TRV heater devices, exploring firmware flashing, SDK usage, and custom firmware development. The XR806 differs from the XR809 notably by including WiFi and BLE capabilities and having 320 KB SRAM versus 288 KB in XR806 specs. Participants shared boot logs, teardown procedures, and hardware photos, confirming the XR806's WiFi presence and SDK version 1.2.2. Efforts to flash custom firmware such as OpenBK7231T_App and OpenXR806 were documented, with challenges including UART synchronization errors, thread creation failures, and unstable WiFi connections. The XR806 SDK was used for compiling demos like hello_demo and wlan_demo, with configuration via make menuconfig to enable WiFi features and FreeRTOS. Issues with missing headers, build environment setup (WSL, GCC toolchain), and SDK path configurations were addressed. A key breakthrough was identifying HTTP basic authentication enabled by default on XR806, blocking HTTP server responses, which was resolved by disabling or clearing the web password. Flash memory configuration was adjusted to a free offset (0x1FC000) to enable saving settings. Despite progress, WiFi stability and full TRV functionality remain under development. Community members sourced XR806 modules from various suppliers and shared open-source projects like TinyMaix-XR806 for reference. The discussion also touched on porting HAL code from XR809 to XR806 due to high similarity, and ongoing efforts to integrate XR806 support into OpenBK7231T_App with online builds. The overall progress marks the first successful custom firmware boot and HTTP server operation on XR806-based WXU modules, paving the way for further development and device control.
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