Hi everyone im working in Adiy SIM A7670C Breakoutboard to arduino uno and is not working and automatically reseting when attached sim. I am tried with vi and airtel 4g sim.
External Power supply of 4.2V.
connect the UART in parallel manner i.e TX to TX & RX to RX.
make all GND common.
Set baud rate to 115200
Upload a blank sketch to UNO. XXXXX
Im tried AT commands it not working properly meanwhile i get message repeated I am attached screenshot below.
Adiy SIM A7670C Breakoutboard to arduino uno is not working automatically reseting when attached sim
Please show a diagram of all connected devices including the power supplies and their ratings.
The 76xx draws quite a bit of current at different times during operation.
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This unit has two critical ratings. If you exceed the 4.2V you can damage the unit. You are using an UNO which outputs 5V on the I/O pins, this may also damage your unit. You should be using a power supply with at least a 4 Amp rating. As requested by @lastchancename Post an annotated schematic showing exactly how you have wired this. Also post links to the technical information on the hardware.
- Supply Voltage – 3.4V to 4.2V
- Power Consumption – 2-3 Amp
- What is your UART voltage? 5V? 3.3V?
- A7670C is made for the chinese marked. Do you intend to use it i china?
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