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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@jakedempsey
I could really use some help. I have an Espruino (http://www.espruino.com/EspruinoBoard). I am trying to connect the fona (https://learn.adafruit.com/adafruit-fona-mini-gsm-gprs-cellular-phone-module/pinouts) to our board.
As of right now I have the fona powered by an external 5v power source plugged into the JST port. I also have the VIO pin plugged into the VBAT of the Espruino. I have the KEY pin plugged into a GND on the Espruino. I have the RST plugged into my B4 gpio on the Espruino.
When I try to issue a command to the fona I get errors in my console that says "Boot Failed, Reset". Our code issues a reset on the B4 pin to reset the modem each time we turn it on.
We want to connect the fona in an 'Always On' configuration and connect to it via serial on the espruino to send http requests. Not sure if that helps. I connected the KEY pin bc the way I read the docs the module is OFF by default and you need to connect KEY to ground to have it always on... maybe I read that wrong too. :(
I think I fundamentally have something connected wrong. Any help would be greatly appreciated!