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OpenMQTT-Gateway/docs/setitup/gsm.md
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Florian 9f5bf3ec57 [DOCS] Remove dead compatible.openmqttgateway.com links (#2205) (#2322)
The compatible.openmqttgateway.com site is offline (TLS connection reset),
leaving 38 dead links across the docs and README. Repoint BLE device lists
to the canonical Theengs Decoder devices page already used by the navbar,
point boards/devices/parts references to the corresponding docs pages, and
drop the affiliate-site mentions and 'Where to Buy' links that have no live
equivalent. Also fix a malformed markdown link in docs/use/ble.md.
2026-06-14 15:26:02 -05:00

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GSM 2G gateway

Compatible parts

Module Purpose Where to Buy
A6 GSM GPRS module -
A7 GSM GPRS module with GPS -

Hardware setup

Module Pin NodeMCU / ESP8266 Pin
H_RXD D6
H_TXD D7
GND GND
VCC5 MOSFET driven by D5

For VCC5 you can power it directly all the time with an USB cable or use a MOSFET like here

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.

So as to start your A6/7 module press the red button for 4 seconds, or link the PWR_KEY GPIO to VCC5.0 for the same time.

Addon_2G