How do I update NB-IoT Unit Global (SIM7020G) firmware?
sgryphon last edited by
The NB-IoT Unit Global (SIM7020G) has firmware 1910B03SIM7020G and there are some functions that are not working, but are working on the Atom DTU NB-IoT Kit Global (SIM7020G) which has firmware 1910B06SIM7020G.
Does anyone know the process to update the firmware?
I have contacted SIMCOM support, and they have sent me a tool, and the latest firmware 1910B08SIM7020G, but I can't get the update working, or know what I am supposed to do.
I have tried connecting the NB-IoT Unit directly to my computer, using a USB-Serial converter, wired direct to TX/RX (and GND).
The converter only has 3.3V, so I also have an external 5V supply.
When it is all connected, I can use a terminal program to directly connect to the modem, and send AT commands.
However I try running their update software and it can't connect.
Does anyone know the correct procedure?
felmue last edited by
from what I can tell there are two (three?) options to update SIM7020 firmware:
- using UART2 (pins 22, 23) with a full firmware file
- using OTA with a delta firmware file
There is something written about FOTA in the AT document as well. It sounds like one could download the delta firmware directly from the SIMCOM? server?
Sorry, I don't know the exact process to update firmware but I am curious myself so please keep us (me) updated about what you find.