ESP bricking itself after changing Arduino power supply?
Posted: Mon Mar 14, 2016 10:07 amI've got my ESP8266-07 running the V0.9.5 AI Thinker firmware (seems to be the only one that works for me) and it is connected to a switching power supply that can provide 5v at about 800mA. The ESP board that I have already has a regulator and logic level shifters so it is definitely running at 3.3 V as needed. I've got a 1000uF cap at between the power supply rails and a 0.1uF cap bridging the VCC and GND pins right next to the ESP.
I'm using my Arduino to send AT commands to the ESP using the software serial library so I can upload temperature data to thingspeak. The code works flawlessly when I have the Arduino connected through USB.
The problem arises when I want to use my 5 volt rail to connect to the Arduino 5V pin so I don't have to be connected to a computer. When I do this, I get no results on thingspeak which tells me something failed. Also, when I hook it back up the the computer and send the AT commands manually using a terminal, the ESP just sends gibberish. At 9600 baud and at 15200 baud this happens. It's as if switching the Arduino to the 5volt rail bricks the ESP. I then have to reflash it with the firmware and it's good.
What could the problem be? I have caps in there to smooth out any fluctuations, the supply can supply adequate current too so what could be the issue?
I'm using my Arduino to send AT commands to the ESP using the software serial library so I can upload temperature data to thingspeak. The code works flawlessly when I have the Arduino connected through USB.
The problem arises when I want to use my 5 volt rail to connect to the Arduino 5V pin so I don't have to be connected to a computer. When I do this, I get no results on thingspeak which tells me something failed. Also, when I hook it back up the the computer and send the AT commands manually using a terminal, the ESP just sends gibberish. At 9600 baud and at 15200 baud this happens. It's as if switching the Arduino to the 5volt rail bricks the ESP. I then have to reflash it with the firmware and it's good.
What could the problem be? I have caps in there to smooth out any fluctuations, the supply can supply adequate current too so what could be the issue?