Note that BluePill is not an ST Product, and likely will not have a genuine STM32 fitted.
@its-nott-me wrote:
bidirectional communication between daisy-chained STM32F103C bluepill boards and an ESP8266. ?
What, exactly, does that mean?
A diagram would probably explain best...
@its-nott-me wrote:
Right now I’m having trouble getting reliable two-way data transfer between the ESP8266 (master) and the STM32 boards (slaves).
So what, exactly, have you tried?
And what, exactly, is/are the problem(s) you're having?
As always, the secret is to not try to do everything all at once - see this.
As @TDK says, there are plenty of examples of doing UART serial comms on STM32; no doubt there are also plenty of examples of doing UART serial comms on ESP32 ESP8266...
Test each part on its own before bringing them together.
Tips specifically on Debugging Serial Comms.
PS:
Corrected ESP32 to ESP8266 - although the principles remain the same for communications between any two devices.
A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.
