Timing problems?

[vjbutt]

This library looks like a very good idea, but unfortunately I have problems getting it to work properly.

The setup that I am testing with is an Arduino Uno board + an ESP8266 ESP-01 module with a 1MByte flash. The ESP-01 is loaded with the original AT version 1.7.5.0 firmware.

I am using the SoftwareSerial library to connect to the ESP-01 with a baud rate of 9600. However, using the library as is, I get problems getting the right response from the ESP-01. For example, even the supplied example program CheckFirmware doesn't work properly. I managed to get this example working by introducing a delay of 30ms after the AT+RST command and in the functions EspAtDrvClass::sendCommand and EspAtDrvClass::simpleCommand before the serial buffer replies are read.

Alas, the above changes were not enough to make a more complicated example work, such as for example WebServer. The only way how I managed to get this working, sort of, is by downloading a previous firmware (AT version 1.7.4.0) and only if I enable LOG_LEVEL_DEBUG. However, even if I go to one level of debugging below this, i.e. LOG_LEVEL_INFO, the WebServer example doesn't work properly (basically the IP of the server is reported incorrectly - 0.0.0.0 and/or the client is not able to connect to the webserver, even when the server IP is reported correctly). So there must be some timing issues. But now it is a bit more difficult for me to debug, since I can't enable LOG_LEVEL_DEBUG (because then the program works properly!).

Any hints of what I can do to get this library working with my setup?

[JAndrassy]

did you set the baud rate at the AT firmware side?

[vjbutt]

Yes, I did. On the ESP-01 this was set to 9600, the same setting as used with the SoftwareSerial library.