yeah i have had the esp01 working in the past but wondering if i can call any headers to control the esp via the mega.. eg wifi.begin() etc or is the only way to use AT commands.
Currently the esp has been used with arduino IDE so i assume I would need to reflash the device with the right firmware,,
Basically trying to decide if its worth getting a shield (that uses the esp12e chip anyway!) or work it out myself... or if i can use the megas analog pin and work out how to send that data over tx1/rx1 to the esp and then send that info to the mqtt broker (if you follow)
other option is to use multiplexing on the esp but unsure if it would work with my homemade probe and dallas onewire temp sensor