A7ModuleTest
This is a test program for the Ai-Thinker A7 module connected to an Arduino Pro Micro or the Elecrow 32u4 with A7 module.
Used PINs
The pin layout is taken from the Elecrow 32u4 with A7 module.
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4 RESET ... with the Arduino Pro Micro this pin must be connected via a N-channel MOSFET (e.g. IRLIZ44N) to the A7 reset pin.
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5 ENABLE
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8 PWRKEY
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10 GPS RX software serial
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16 GPS TX software serial (not used)
Serial Connections
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Serial is console
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Serial1 is the hardware serial port to the A7 GSM UART
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SoftwareSerial( 10, 16 ) serial port to A7 GPS UART (RX=10, TX=16)
Console Commands
GPS
you can switch on and off the GPS serial port
- gps=on
- gps=off
GSM / GPRS
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every command starting with at is directly send to the GSM UART
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if you like to send characters not starting with at start with a '-char as first character.
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ctrlz is sending a CTRL-Z char to the GSM UART
Boot Sequence
At the program start RESET, ENABLE and PWRKEY are set to HIGH level. After 3s RESET is set to LOW level.