I'm using a stm32g473 and a sim7600E-H, uart not working reliably.

TMich.1 · ‎2023-03-15

In my code i first setup the sim7600 using blocking mode and later switch to dma. But in blocking mode I'm having trouble receiving data over uart. Using a nucleo it sometimes works very reliably and other times doesn't work at all or it only receives the first letter. on my custom board i once was able to get at ok response but other times it was nothing or some random character. What could be the reason?

Karl Yamashita · ‎2023-03-16

Post your relevant code

I was told that if a devices starts to smoke, put the smoke back in. I guess I never got all the smoke because the device never worked afterwards.
Don't worry, I won't byte.
TimerCallback tutorial! | UART and DMA Idle tutorial!

If you find my solution useful, please click the Accept as Solution so others see the solution.

TMich.1 · ‎2023-03-16

sorry, here it is:

that good enough? i can put in the entire code as well if that is better

Mohamed Aymen HZAMI · ‎2023-03-27

Hello @TMich.1,

Try to use the CubeFirmware USART with DMA example.

Mohamed Aymen

Karl Yamashita · ‎2023-03-27

There is no way to know what you're doing in SIMTransmitSetup? Post your code as a Code Snippet.

I was told that if a devices starts to smoke, put the smoke back in. I guess I never got all the smoke because the device never worked afterwards.
Don't worry, I won't byte.
TimerCallback tutorial! | UART and DMA Idle tutorial!

If you find my solution useful, please click the Accept as Solution so others see the solution.

TMich.1 · ‎2023-04-06

it ended up being a poor connection between chip and pcb, thank you for your help