Awesome
Anjay ESP32 Client
Overview
This repository contains a LwM2M Client application example for ESP32 devices, based on open-source Anjay-esp-idf component and Espressif IoT Development Framework.
The following boards are supported natively in the project:
- ESP-WROVER-KIT
- ESP32-DevKitC
- M5StickC-Plus
You may also use other boards, by selecting the Unknown
board and manually configuring available peripherals through Kconfig.
The following LwM2M Objects are supported:
Target | Objects |
---|---|
Common | Security (/0)<br>Server (/1)<br>Device (/3)<br>Firmware Update (/5)<br>WLAN connectivity (/12) |
ESP-WROVER-KIT | Push button (/3347)<br>Light control (/3311) |
ESP32-DevKitC | Push button (/3347) |
M5StickC-Plus | Push button (/3347)<br>Light control (/3311)<br>Temperature sensor (/3303)<br>Accelerometer (/3313)<br>Gyroscope (/3343) |
Compiling and launching
- Install ESP-IDF and its dependencies on your computer. Please follow the instructions at https://docs.espressif.com/projects/esp-idf/en/v4.4.5/esp32/get-started/index.html up to and including the point where you call
. $HOME/esp/esp-idf/export.sh
- The project has been tested with ESP-IDF v4.4.5, but may work with other versions as well.
- Clone the repository
git clone https://github.com/AVSystem/Anjay-esp32-client.git
and navigate to project directory - Initialize and update submodules with
git submodule update --init --recursive
- Run
idf.py set-target esp32
in the project directory - Run
idf.py menuconfig
- navigate to
Component config/anjay-esp32-client
:- select one of supported boards or manually configure the board in
Board options
menu - configure LwM2M client configuration in
Client options
menu - configure Wi-Fi in
Connection configuration
menu
- select one of supported boards or manually configure the board in
- navigate to
Component config/Anjay library configuration
to configureAnjay
library and its dependencies (avs_commons
andavs_coap
)
- navigate to
- Run
idf.py build
to compile - Run
idf.py flash
to flash- NOTE: M5StickC-Plus does not support default baudrate, run
idf.py -b 750000 flash
to flash it
- NOTE: M5StickC-Plus does not support default baudrate, run
- The logs will be on the same
/dev/ttyUSB<n>
port that the above used for flashing, 115200 8N1- You can use
idf.py monitor
to see logs on serial output from a connected device, or even more convenientlyidf.py flash monitor
as one command to see logs right after the device is flashed
- You can use
Connecting to the LwM2M Server
To connect to Coiote IoT Device Management LwM2M Server, please register at https://eu.iot.avsystem.cloud/. The default Server URI (Kconfig option ANJAY_CLIENT_SERVER_URI
) is set to EU Cloud Coiote DM instance, but you must manually set other client configuration options.
NOTE: You may use any LwM2M Server compliant with LwM2M 1.0 TS. The server URI can be changed in the example configuration options.
Connecting using NVS provided credentials
It is possible to use pre-built binaries to flash the board and provide credentials by flashing a NVS partition binary.
To do that, esptool.py
is required, which can be installed running pip install esptool
Creating a merged binary for M5StickC-Plus
esptool.py --chip esp32 merge_bin --flash_mode dio --flash_size 4MB --flash_freq 40m 0x1000 build/bootloader/bootloader.bin 0x8000 build/partition_table/partition-table.bin 0x10000 build/anjay-esp32-client.bin 0x310000 build/storage.bin --output m5stickc-plus.bin
NVS config file
To generate NVS partition, create a nvs_config.csv
file with following content:
key,type,encoding,value
config,namespace,,
wifi_ssid,data,string,[wifi_ssid]
wifi_pswd,data,string,[wifi_password]
wifi_inter_en,data,u8,1
endpoint_name,data,string,[endpoint_name]
identity,data,string,[identity]
psk,data,string,[psk]
uri,data,string,[lwm2m_server_uri]
writable_wifi,namespace,,
wifi_ssid,data,string,[wifi_ssid]
wifi_pswd,data,string,[wifi_password]
wifi_inter_en,data,u8,0
And fill proper values for [wifi_ssid]
, [wifi_password]
, [endpoint_name]
, [identity]
, [psk]
, [lwm2m_server_uri]
.
After that create config partition by running:
python3 $IDF_PATH/components/nvs_flash/nvs_partition_generator/nvs_partition_gen.py generate nvs_config.csv nvs_config.bin 0x4000
Flashing the firmware and partitions
After partition is created, flash firmware and configuration using following commands (baudrate may vary depending on your board):
esptool.py -b 750000 --chip esp32 write_flash 0x0000 m5stickc-plus.bin
esptool.py -b 750000 --chip esp32 write_flash 0x9000 nvs_config.bin
Device will be reset and run with provided configuration.
TCP socket
To switch to TCP socket instead of UDP run idf.py menuconfig
, navigate to Component config/anjay-esp32-client/Client options/Choose socket
and select TCP (remember that you must also provide a proper URI in the nvs_config.csv
file, e.g. coaps+tcp://eu.iot.avsystem.cloud:5684
).
ESP32 with certificates
- Prepare your certificates. All certificates should have a
.der
extension and should be added to the directory where thisREADME.md
file is located. The names of the certificates should be as follows:- client public certificate -
client_cert.der
- client private certificate -
client_key.der
- server public certificate -
server_cert.der
- client public certificate -
- Run
idf.py menuconfig
, navigate toComponent config/anjay-esp32-client/Client options/Choose security mode
and selectCertificates
.
FOTA
After compilation, you can perform FOTA with Coiote DM. Required binary file location:
$PROJECT_DIR/build/anjay-esp32-client/build/anjay-esp32-client.bin
ESP32 with BG96 and FreeRTOS cellular library
- Prepare your BG96 module, connect it to the selected ESP32 UART interface.
- Run
idf.py menuconfig
- navigate to
Component config/anjay-esp32-client
:- select
External BG96 module
inChoose an interface
menu
- select
- navigate to
Component config/Anjay library configuration/Enable support for external BG96 module
:- configure BG96 in
BG96 module configuration
menu - configure PDN authentication type in
PDN authentication type
menu - configure the
APN name
(andPDN username/password
if needed)
- configure BG96 in
- navigate to