This registers device certificate to Azure IoT DPS service and prepares for connecting Azure IoT Hub.
Platformio with VS Code environment.
install "Espressif 32" platform definition on Platformio
Prior to compile this project, you need to configure ATECC608A with ECC608-MassProvisioning
to enable IO protection key feature correctly.
and you must copy "cert_chain.c", which is made by ECC608-MassProvisioning to "src" folder.
you need to modify the definition and variables in main.c as follows:
// your SSID and PASS
#define EXAMPLE_WIFI_SSID ""
#define EXAMPLE_WIFI_PASS ""
// URL and ID scope which are pointed out by your Azure IoT DPS service console.
static const char* global_prov_uri = "";
static const char* id_scope = "";Espressif ESP32-DevkitC
this project initialize both of I2C 0,1 port, and the device on I2C port 0 is BME280 Ambient sensor.
pin assined as below:
I2C 0 SDA GPIO_NUM_18
I2C 0 SCL GPIO_NUM_19
I2C 1 SDA GPIO_NUM_21
I2C 1 SCL GPIO_NUM_22Microchip ATECC608A(on I2C port 1)
This code currently not supported TRUST&GO and TRUSTFLEX versions.
Once you do git clone, you need to execute "git submodule update --init --recursive"
you need to change a serial port number which actually connected to ESP32 in platformio.ini.
At first, you need to create self-signed CA chain by using python scripts step-by-step in "scripts" folder for test purpose.
1, create root-ca.crt and signer-ca.crt
2, convert their extension from .crt to .pem to upload Azure IoT DPS certificate registration.
this is an example scripts for root cert registration as follows:
openssl ecparam -name prime256v1 -genkey > azureroot.key
openssl req -new -sha256 -key azureroot.key -subj "/C=JP/ST=Tokyo/L=Tokyo/O=test/OU=test/CN=<confirmation code from Azure DPS>" -out azureroot.csr
openssl x509 -req -in azureroot.csr -CA root-ca.pem -CAkey root-ca.key -CAcreateserial -out azureroot.pem -days 3650 -sha256 you can register signer-ca as well.
3, you need to verify them follow the steps described by Azure IoT DPS.
If you don't make sense this topic, check azure DPS setup step by step.docx or,
please step back to ECC608-MassProvisioning.
If you run this project with success, you can find the results on serial console as follows:
....
Registering testcorp.azure-devices.net ...
Azure IoT URL provisioning complete.
device sn provisioning complete.
This software is released under the MIT License, see LICENSE.