Update code via UART instead of FOTA nRF9160

Question

Hello, 
 I am using your NRF9160 chip and need Nordic team help. I have refer to your FOTA sample, I am looking for a safer solution for updating code. On my board, I use ESP32, Is there any way to download the app_update.bin file with ESP32 chip and transmit that file via the UART line for the Nordic chip? 
 In our living area, NB-IoT signal is not really popular, so it's hard for me to update the FOTA with NB-IoT. 
 Thanks

Simon · Accepted Answer

Is there no way of downloading the DFU update directly to the nRF9160? That would really simplify this. If I have understood it correctly, you want to first download it to the ESP32 and then transfer it to the nRF9160? The .bin file is just a big block of bytes, so you need to set up a uart on the ESP32 and a uart on the nRF9160 and send all the bytes over, a few bytes at the time. Regarding the ESP32, you have to first download the .bin file and either transfer it directly (as you receive it from the cloud) to the nR9160 or save it in flash temporarily and then send it over. However, I can't really help you with the ESP32, since this is not our product, you have to ask here: https://www.espressif.com/ . When you've gotten that to work, you need to set up UART on the nRF9160 to receive the .bin file. For that you can use the LPUART sample. Then you can connect RX91<->TX ESP32 and TX91<->RX ESP32 and GND<->GND (and optionally the flow control lines). After this, you have to execute the steps 1-3, which I mentioned in the initial post. But we can get back to this later, when you have been able to set up UART communication between the two boards. Here is the lpuart sample: https://github.com/nrfconnect/sdk-nrf/tree/v1.6.0/samples/peripheral/lpuart Here is the lpuart sample with flow control disabled: https://github.com/simon-iversen/sdk-nrf/tree/b548980db67ad4f05cfe2ac64e321d143c1111c7/samples/peripheral/lpuart

Update code via UART instead of FOTA nRF9160

Top Replies