Three signed images, free to flash with a free account: the BLE scanner for the nRF52840 on the M2 card, the uplink for the ESP32 base, and the cellular bearer for the nRF9160 on the LN card. Wi-Fi and Ethernet run without limit; cellular runs in 60-minute sessions in this build, for evaluation. Licensed source is on request. Row by row: gateway firmware.
The gateway, with the cellular card
The LEW840x carries its radios on two M.2 slots. For cellular the LN slot takes an nRF9160-based card (Fanstel’s LN-series, LTE-M, NB-IoT and GNSS) and the M2 slot keeps the BLE card. The ESP32 on the base owns the network and the dashboard; the nRF52840 scans; the nRF9160 is the cellular bearer.- Closed
- Board in view
The LEW840X, closed. The cellular variant is the same enclosure with the second antenna fitted.
What you need
- A Fanstel LEW840x with a cellular card in the LN slot and a BLE card in the M2 slot, a SIM, and the antennas fitted.
- Fanstel’s UART bridge for the base (flashing the ESP32) and an nRF52840 DK or another J-Link probe on the gateway’s debug header (flashing the nRF chips over SWD). The agent tells you which header reaches which chip.
- VS Code with Adsum IoT Coder,
nrfutilandesptoolon this machine. No SDK, no toolchain: the images are prebuilt and signed. - A free account: register from the card when it asks, GitHub or email, no card.
No SDK is needed for this page. If you later want to change the firmware, the base build shows the toolchains, and licensed source gives you the modules to extend.
Flash the signed images
The card a registered user sees on the home. The limits are stated before the button.
1
Register, once
Open the Adsum panel with the gateway on the desk. The Flash the LEW840x demo card asks you to register the first time: your browser opens, GitHub or email, and you come straight back.
2
Press Flash demo
The agent loads the signed images and their hashes from the registry and verifies them before anything is written. It checks that
nrfutil and esptool are on this machine and says plainly if they are not.3
Tell it which port is which
It asks which serial port is the UART bridge and which probe reaches the nRF chips, then flashes in order: the BLE scanner, the ESP32 uplink, the nRF9160 bearer. About three minutes.
4
Bring it up
On first power-up the gateway is its own Wi-Fi access point, serving its dashboard from its own flash. Join it, enter your broker and, if you use them, your Wi-Fi credentials, choose the uplink priority, save. It reboots into running mode. Holding reset for more than 10 seconds returns it to configuration mode.
What you will see
- Overview
- BLE devices
- Live data
Overview: uplink and MQTT status, IP address, uptime, and how many BLE devices are being seen.
From evaluation to your product
The images are for judging the hardware and the firmware on your own network. When it does what you need, the same firmware is available as licensed source, per module (the scanner, the uplink, the bearer), so your team can extend it with the agent: ask from Settings › Account › Request template source, or write to support@adsumnetworks.com. The licence covers production use and your modifications stay yours; the details depend on what you are building.Gateway firmware, row by row
What exists for the LEW gateway today, as signed images and as licensed source, and what is next.
Cellular IoT on nRF91
NB-IoT, LTE-M and GNSS bring-up, the board shell and the modem trace, when you go past the images.