I’m obtaining a challenge with the module. I’ve connected to the Arduino 5V but when sending the AT commands, it works in some cases and from time to time it offers me the error “Less than VOLTAGE WARNING”.
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The expected TX/RX sign voltage is a bit of a thriller to me. I’d suspect 3.3V should do the job, as my FTDI cable utilizes this signal voltage. Probably the ESP just isn't furnishing solid enough (probably not even 3.3V) indicators.
This is intended to facilitate energy consumption Investigation in a variety of Procedure modes of ESP32. Seek advice from schematic - the adjustments are enclosed in inexperienced border.
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Kurt March 7, 2017 8:31 AM You will find a very good prospect you’re not furnishing the SIM800L sufficient energy. It certainly has to be supplied by anything in addition to the 5V with the Arduino as it will eventually pull 2A as famous earlier mentioned. A breadboard ability More about the author supply which include this along with a 2A wall transformer will operate flawlessly.
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