25 lines
1011 B
Markdown
25 lines
1011 B
Markdown
# GSM 2G gateway
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## Compatible parts
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|Module|Purpose|Where to Buy|
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|A6|GSM GPRS module|[compatible parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
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|A7|GSM GPRS module with GPS|[compatible parts list](https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit#gid=1323184277)|
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## Hardware setup
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|Module Pin|NodeMCU / ESP8266 Pin|
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|H_RXD|D6|
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|H_TXD|D7|
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|GND|GND|
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|VCC5|MOSFET driven by D5|
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For VCC5 you can power it directly all the time with an USB cable or use a MOSFET like [here](https://gitlab.com/stavros/A6-ESP8266-breakout/raw/master/images/schematic.png)
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Don't use the nodemcu/wemos 5V pin for the A6/7 power, use a dedicated power supply for both or dedicated to the A6/7 with at least 2 amps ability.
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So as to start your A6/7 module press the red button for 4 seconds, or link the PWR_KEY pin to VCC5.0 for the same time.
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