I just started to play with 5 new ESP-01 and tried to connect them via terminal.
What I got under coolterm is this:
*EMRDY: 1
*EMRDY: 1
atOK
at+gmrR2A07(R2A07)
OK
at+rstERROR
at+gslpERROR
ateOK
at+cwmode=?ERROR
at+cipstart=?ERROR
at+cmd?ERROR
ateOK
ate1OK
at+rstERROR
So ... every AT command returns an error (except at, ate and at+gmr)
And the answer from gmr is quite strange, I didn't find any hint on the net.
Can you give me some hints? I don't believe all 5 chips are broken, they all behave the same way, so the mistake must be on my side.
Kind regards from Germany
Eric