AWS-IOT ESP8266 device

Getting Started

Register a thing with AWS iot

https://aws.amazon.com/iot-core/

Download and convert cert and private key

Convert PEM to DER format: (On Windowns you should download openssl first)

$ openssl x509 -in aaaaaaaaa-certificate.pem.crt.txt -out cert.der -outform DER

$ openssl rsa -in aaaaaaaaaa-private.pem.key -out private.der -outform DER

Convert to binary

$ xxd -i <cert/key file in DER format>

Create a secrets.h file

#define BIN_CRT <binary certificate>
#define BIN_CRT_LEN <binary cert length>
#define BIN_KEY <binary private key>
#define BIN_KEY_LEN <binary key length>
#define AWS_ENDPOINT <"foobar.iot.region.amazonaws.com">
#define UPDATE_TOPIC <"$aws/things/yourThingName/shadow/update">

Upload the code with Arduino IDE

Connect to the AP

• Look for the wifi with an SSID like ESP-<some id>
• Visit 192.168.4.1 in your browser
• Input wifi credentials that the device can connect to

See it update the device shadow

The device will update the shadow, then deep sleep for 10 seconds.

BOM

• Adafruit Huzzah ESP8266
• Sparkfun Soil Moisture Sensor
• Adafruit Half-sized Protoboard