AT Commands return what i send.
Posted: Thu Oct 22, 2015 9:55 amI am newbie here and am working on kind of wifi-controlled Vehicle(Car or maybe Hovercraft later).My ESP8266 repeats the commands I use. For example,AT gives AT, AT+GWR gives AT+GWR, dabdabik gives dabdabik,etc.
I use Arduino Uno to send commands as I don't have FTDI related stuff(USB to Serial Converter). I use AA cells for power supply(1.5v*2=3v). I don't even have 3.3 volt direct supply. I use Arduino IDE Serial Monitor. I connected Arduino TX to ESP8266 RX via voltage divider(1.66Kohm(TX) and 1.66Kohm(GND)->3.29 Ohm(RX)).
My Connections are: ESP8266----------------Arduino Uno TX---Voltage divider---RX(d0) RX---------------------TX(d1) GND--------------------GND VCC-------3V CH_PD-----3V
Sometimes it gives garbage otherwise repeats(weird). Garbage ONLY changes if baud rate is changed. I flashed it(it seemed) with AT 9.5.2 firmware. Flashing works rarely ONLY with TX to TX connected directly without voltage divider. Tried as much as I could after searching the web and esp8266 forum but still couldn't solve problem.
Please help. I am student in a small town(Manipal) in Southern India so no good stores nearby and I don't want to buy FTDI friend or anything else on-line.(SOORY). I am a bit new to electronics, but I am a C++ programmer and student so SORRY for my noobiness and English. And Thank you in advance.
UPDATE: Now noticed after some resets it gives full garbage to longer commands most of the time whereas two letter commands are partial garbage. For example AT gives IT,TT,OT,etc.
I use Arduino Uno to send commands as I don't have FTDI related stuff(USB to Serial Converter). I use AA cells for power supply(1.5v*2=3v). I don't even have 3.3 volt direct supply. I use Arduino IDE Serial Monitor. I connected Arduino TX to ESP8266 RX via voltage divider(1.66Kohm(TX) and 1.66Kohm(GND)->3.29 Ohm(RX)).
My Connections are: ESP8266----------------Arduino Uno TX---Voltage divider---RX(d0) RX---------------------TX(d1) GND--------------------GND VCC-------3V CH_PD-----3V
Sometimes it gives garbage otherwise repeats(weird). Garbage ONLY changes if baud rate is changed. I flashed it(it seemed) with AT 9.5.2 firmware. Flashing works rarely ONLY with TX to TX connected directly without voltage divider. Tried as much as I could after searching the web and esp8266 forum but still couldn't solve problem.
Please help. I am student in a small town(Manipal) in Southern India so no good stores nearby and I don't want to buy FTDI friend or anything else on-line.(SOORY). I am a bit new to electronics, but I am a C++ programmer and student so SORRY for my noobiness and English. And Thank you in advance.
UPDATE: Now noticed after some resets it gives full garbage to longer commands most of the time whereas two letter commands are partial garbage. For example AT gives IT,TT,OT,etc.