I tracked it down to a bit of a mess with freertos config. I was using btstack, sdcard and a basic freertos as well. It worked, somehow, on two picos but not on any of the others. I removed btstack and BLE functionality as it was taking too much power from the solar setup and I've gone back to a pico 2 and freertos pulled in from the sdcard library and it's all fine now.
The clue was the main_task function which shouldn't have been there. I think it was part of btstack, which is fine but I was also setting up tasks in main and it all got a bit too much for the system.
Thanks for the pointers which made me think about what was going on.
The clue was the main_task function which shouldn't have been there. I think it was part of btstack, which is fine but I was also setting up tasks in main and it all got a bit too much for the system.
Thanks for the pointers which made me think about what was going on.
Statistics: Posted by codebrane — Sun Sep 28, 2025 9:15 pm