Edge Impulse enables developers to create the next generation of intelligent device solutions with embedded Machine Learning. This repository contains the Edge Impulse firmware for the Nordic Semiconductor Thingy:53 development board that includes a subset of the available sensors, for all of the currently supported sensors see src/sensors. This firmware supports all Edge Impulse features, including ingestion, remote management, and inferencing. Direct communication with the device is performed over a mobile application, but the user can execute all functions via AT command over a USB interface. By including specific build configuration this firmware can be enabled to run with Nordic compatible WiFi external board nRF7002eb.

1. Install the nRF Connect SDK in a separate folder from this repository (e.g. ~/repos/ncs).

2. Clone this repository:

   $ git clone https://github.com/edgeimpulse/firmware-nordic-thingy53

3. Build the application:

   #  Thingy:53 build command
   $ west build -b thingy53_nrf5340_cpuapp
   
   # Thingy:53 with nRF7002eb (WiFi) builf command
   $ west build -b thingy53_nrf5340_cpuapp -- -DSHIELD=nrf7002eb 

1. Clone this repository:

   $ git clone https://github.com/edgeimpulse/firmware-nordic-thingy53

2. Build the Docker container:

   $ docker build -t edge-impulse-nordic .

3. Build the application:

   #  Thingy:53 build command
   $ docker run --rm -v $PWD:/app edge-impulse-nordic west build -b thingy53_nrf5340_cpuapp
   
   # Thingy:53 with nRF7002eb (WiFi) builf command
   $ docker run --rm -v $PWD:/app edge-impulse-nordic west build -b thingy53_nrf5340_cpuapp -- -DSHIELD=nrf7002eb 

1. Connect the JLink to the Thingy:53 as described in this guide; if not previously done, erase the chip with:

   $ nrfjprog --recover

2. Flash the chip, both application core and networking core, with the command:

   $ west flash

1. Connect USB-C to the Thingy:53. Open the enclosure, press the small button (SW2) on top of the device and turn the power switch on.

   

2. After the device is on, release the button. The device is now in bootloader mode. For flashing the new firmware, use commands:

   mcumgr -t 60 --conntype serial --connstring=/dev/ttyACM0 image list
   mcumgr -t 60 --conntype serial --connstring=/dev/ttyACM0 image upload app_update.bin
   

Follow the steps from this guide. Instead of precompiled firmware, use the file build/zephyr/app_signed.hex.

Use nRF Connect for Android or nRF Connect for iOS and build/zephyr/dfu_application.zip. After connecting to the device, click on the DFU icon and select the file. When the DFU process is done, the device will boot with the new image.

1. Install mcumgr

2. Upload the firmware (adjust the path to app_update.bin and hci interface number if you have a few of them)

   mcumgr --conntype ble --hci 0 --connstring peer_name='EdgeImpulse' image upload app_update.bin

3. Check if the firmware has been uploaded correctly and get the hash of new firmware

   mcumgr --conntype ble --hci 0 --connstring peer_name='EdgeImpulse' image list

   The output should be similar to the one below; the new image is in slot 1.

   Images:
   image=0 slot=0
       version: 0.9.9
       bootable: true
       flags: active confirmed
       hash: 67f6f87f3f639217140f9e8073cb28f214499d7f646cb774276496108326a7ba
   image=0 slot=1
       version: 0.9.1
       bootable: true
       flags:
       hash: c218220606d3ecef26dc46ffd7c112e700d08837335516c40ae12f6a86aa7ab2
   Split status: N/A (0)
   

4. Test the image and swap the images

   mcumgr --conntype ble --hci 0 --connstring peer_name='EdgeImpulse' image test <HASH_OF_THE_IMAGE>
   

5. Reset the device (may take up to 10-20 seconds)

   mcumgr --conntype ble --hci 0 --connstring peer_name='EdgeImpulse' reset