How to update firmware.md

Step

SIM800 built-in firmware update tool Because SIMCOM has not adapted and updated the new system for a long time, it is not necessarily available to upgrade the built-in firmware tool. Most users are stuck waiting for download. Please be informed

1. First, you need to update the ESP32's built-in firmware, open the UpdateFirmware example, compile and burn it into the board.

2. Unzip SIM800_Series_download_Tools_Customer_v1.23.rar

3. Open Flash_tool.exe

4. Select the relative firmware and port according to the diagram

5. Wait for the board indicator to light up, then click the Start Download button, and wait for it to finish

Firmware Link

• Flash Tools
• SIM800L 1309B10SIM800L16
• SIM800C 1309B12SIM800H32