Trouble Interfacing 4G Board with SIM Network

Products 4G/LTE SIMCom A7672S LTE CAT 1 with ESP32
1

We’re facing challenges integrating the 4G board with SIM network. Despite following instructions, we’re unable to establish a connection.

Your prompt assistance in resolving this matter is crucial for our project. Could you please provide guidance or any necessary updates?

2

4G module requires the following to be in place to ensure proper bootup process, network connectivity and SIM registration.

Please follow the steps below and let us know:

  1. Power Requirement: SIMCOM A7672S 4G/LTE module requires 2A of current for bootup. Edgehas 4G board is designed for 9V 2A DC power input. Please use an adapter and you can connect using the DC jack on the 4G board. Note that the board is designed for 9V only. Do not connect 12V.
  2. Antenna for signal strength: Ensure that antenna is connected to the SMA connector on the board. Even though this is not mandatory but if the mobile signal strength is low at your location (inside buildings, remote areas) then antenna will help boost the signal and network connectivity.
  3. SIM Card: Edgehax 4G board works with any of Airtel, BSNL, Jio or Vodaphone Idea provider. You can use a Pre-paid, post paid or even a M2M sim card for your IoT deployments. Full supports M2M connectivity as the Edgehax 4G module supports 2G fall back as well. Please ensure the SIM card is recharged and can send SMS, has data for internet connectivity (cloud sync or data push to cloud use cases)
  4. Sample 4G test program: Once the above settings are in place then you can connect the board via Type-C connector and if the board isnt detected then you can follow the driver installation instructions from here and try reconnectivng the board to USB port. Once the board is detected on the USB port then download a test program (Arduino sketch file) from our Github repository https://github.com/edgehax/4G-LTE-MODULE-SIMCOM-A7672S-ESP32 and upload to the board via USB Type-C connector. You can select the board type as “ESP32-WROOM-DA MODULE“.
  5. Cloud Push and SMS Test: Upon loading the sample program you will see that a test JSON object containing 4G module IMEI number and modle details is pushed to a free Pipe dream URL which you can change that to your own call back URL to test cloud push. Along with this an SMS would also be sent to your mobile number which you can add in the code at the beginning - set this variable to your phone number –> #define SMS_TARGET1 “<10-digit-mobile-number>”. Note that you should not add any country code just add phone number 10 digit.

Try the above steps and let us know if still facing issues.

1 Like
3

Ok had missed the dc adapter as we were testing it on just USB connector. Let me test this with adapter and update the results. We are using Airtel sim card from mobile phone regular one.