I have been prototyping on an ESP-01S module for some time using the Arduino IDE and this programmer.
I thought I'd change to a module with FCC approval so bought some WROOM-02 modules from RS Components. I made up a board to convert the pins from the ESP-01 pinout to an adapter for the WROOM-02 (and yes I've checked all the wiring a million times but when I try to program it all I get is
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
SPIFFS Upload failed!
Is there some subtle difference to the WROOM-02 I've missed. I bought three of them and they all have the same problem, and plugging the ESP-01S back in programs perfectly so I haven't broken the programmer.
Any suggestions gratefully received.