kopia lustrzana https://github.com/helium/longfi-arduino
AWS IoT Demo (#18)
Louis Thiery
GitHub
rodzic
d48d6df55f
commit
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# ST B-L072Z-LRWAN1 - Button to AWS Example
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This is an example code for building an AWS IoT application that sends you text messages using Twilio.
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You'll need:
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* ST-B-L072Z-LRWAN1
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* An AWS account
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* A Twilio account
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You need to load this sketch onto the ST-B-L072Z-LRWAN1. The sketch will send a heartbeat every 15 seconds and will asyncronously send an alert whenever the button is pressed.
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Once you confirm that the device is connecting and sending data via Helium Console, you'll want to setup an integration to AWS IoT.
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Once you do that, you want to create a Lambda function using the Python file here: lambda_button_text.py
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You'll need to set environmental variables to make it work:
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* TWILIO_AUTH_TOKEN: get this from your Twilio dashboard
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* TWILIO_ACCOUNT_SID: get this from your Twilio dashboard
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* TWILIO_ASSIGNED_NUMBER: get this from your Twilio dashboard
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* USER_NUMBER: this is the cell phone number which will get text message alerts when the button is pressed
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Once you save the lambda function, you will simply need to connect the lambda function to an AWS IoT trigger. Use the rule query statement: SELECT * FROM "helium"
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Now you're done! Press the button and you should get a text message.
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## Required Arduino Libraries
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From the Arduino IDE, open the Library Manager (Sketch->Include Library->Manage Libraries). In the search box, type the library name below and install the latest version.
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[MCCI Arduino LoRaWAN Library](https://github.com/mcci-catena/arduino-lmic)
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## Required Arduino Board Support
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### B-L072Z-LRWAN1 - ST STM32L0 Discovery kit
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Install board support package, find instructions [here](https://github.com/stm32duino/Arduino_Core_STM32#getting-started).
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Arduino IDE:
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1. Select Tools -> Board: -> Discovery
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2. Select Tools -> Board part number: -> Discovery L072Z-LRWAN1
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## Required Hardware
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### B-L072Z-LRWAN1 - ST STM32L0 Discovery kit
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[B-L072Z-LRWAN1 Product Page](https://www.st.com/en/evaluation-tools/b-l072z-lrwan1.html)
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[B-L072Z-LRWAN1 User Manual](https://www.st.com/content/ccc/resource/technical/document/user_manual/group0/ac/62/15/c7/60/ac/4e/9c/DM00329995/files/DM00329995.pdf/jcr:content/translations/en.DM00329995.pdf)
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## Programming (Uploading Method):
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#### STM32CubeProgrammer(SWD)
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Will use onboard ST-Link(Flasher/Debugger) to upload sketch.
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Download and Install required utility from ST [here](https://www.st.com/en/development-tools/stm32cubeprog.html).
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Arduino IDE:
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Select Tools -> Upload Method -> STM32CubeProgrammer(SWD)
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### PlatformIO Support
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The PlatformIO Board file for this board is currently using the incorrect OpenOCD (Upload/Debug)
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script for the microcontroller on this board. We are in the process of pushing a fix upstream. When
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uploading or debugging, hold the reset button down right until the upload or debug process initiates
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it's routine in communicating with the board, this seems to aleviate the issue for right now.
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`platformio.ini`
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```
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[env:disco_l072cz_lrwan1]
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platform = ststm32
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board = disco_l072cz_lrwan1
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framework = arduino
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lib_deps =
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MCCI LoRaWAN LMIC library
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CayenneLPP
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```
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import base64
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import json
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import os
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from botocore.vendored import requests
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TWILIO_ACCOUNT_SID = os.environ.get("TWILIO_ACCOUNT_SID")
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TWILIO_AUTH_TOKEN = os.environ.get("TWILIO_AUTH_TOKEN")
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TWILIO_SMS_URL = "https://api.twilio.com/2010-04-01/Accounts/" + TWILIO_ACCOUNT_SID + "/Messages.json"
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TWILIO_ASSIGNED_NUMBER = os.environ.get("TWILIO_ASSIGNED_NUMBER")
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USER_NUMBER = os.environ.get("USER_NUMBER")
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def lambda_handler(event, context):
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byte_arr = list(base64.b64decode(event['payload']))
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if byte_arr[0] == 1 :
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to_number =USER_NUMBER
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from_number = TWILIO_ASSIGNED_NUMBER
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body = "Button pressed!"
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data = {"To": to_number, "From": from_number, "Body": body}
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response = requests.post(TWILIO_SMS_URL, data = data, auth=(TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN))
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print(response.text)
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return "Button pushed - Message Sent"
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else:
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print("Heartbeat")
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return "Heartbeat"
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#include <lmic.h>
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#include <hal/hal.h>
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#include <SPI.h>
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// This should also be in little endian format
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static const u1_t PROGMEM DEVEUI[8]= { FILL_ME_IN };
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void os_getDevEui (u1_t* buf) { memcpy_P(buf, DEVEUI, 8);}
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// This should also be in little endian format
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static const u1_t PROGMEM APPEUI[8]= { FILL_ME_IN };
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void os_getArtEui (u1_t* buf) { memcpy_P(buf, APPEUI, 8);}
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// This key should be in big endian format
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static const u1_t PROGMEM APPKEY[16] = { FILL_ME_IN };
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void os_getDevKey (u1_t* buf) { memcpy_P(buf, APPKEY, 16);}
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static uint8_t mydata[] = {0};
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static osjob_t sendjob;
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// Schedule TX every this many seconds (might become longer due to duty
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// cycle limitations).
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const unsigned TX_INTERVAL = 15;
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// Pin mapping
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#include "arduino_lmic_hal_boards.h"
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// Pin mapping Discovery
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const lmic_pinmap lmic_pins = *Arduino_LMIC::GetPinmap_Disco_L072cz_Lrwan1();
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void printHex2(unsigned v) {
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v &= 0xff;
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if (v < 16)
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Serial.print('0');
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Serial.print(v, HEX);
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}
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void onEvent (ev_t ev) {
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Serial.print(os_getTime());
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Serial.print(": ");
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switch(ev) {
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case EV_SCAN_TIMEOUT:
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Serial.println(F("EV_SCAN_TIMEOUT"));
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break;
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case EV_BEACON_FOUND:
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Serial.println(F("EV_BEACON_FOUND"));
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break;
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case EV_BEACON_MISSED:
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Serial.println(F("EV_BEACON_MISSED"));
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break;
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case EV_BEACON_TRACKED:
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Serial.println(F("EV_BEACON_TRACKED"));
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break;
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case EV_JOINING:
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Serial.println(F("EV_JOINING"));
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break;
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case EV_JOINED:
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Serial.println(F("EV_JOINED"));
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{
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u4_t netid = 0;
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devaddr_t devaddr = 0;
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u1_t nwkKey[16];
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u1_t artKey[16];
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LMIC_getSessionKeys(&netid, &devaddr, nwkKey, artKey);
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Serial.print("netid: ");
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Serial.println(netid, DEC);
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Serial.print("devaddr: ");
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Serial.println(devaddr, HEX);
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Serial.print("AppSKey: ");
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for (size_t i=0; i<sizeof(artKey); ++i) {
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if (i != 0)
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Serial.print("-");
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printHex2(artKey[i]);
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}
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Serial.println("");
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Serial.print("NwkSKey: ");
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for (size_t i=0; i<sizeof(nwkKey); ++i) {
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if (i != 0)
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Serial.print("-");
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printHex2(nwkKey[i]);
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}
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Serial.println();
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}
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// Disable link check validation (automatically enabled
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// during join, but because slow data rates change max TX
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// size, we don't use it in this example.
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LMIC_setLinkCheckMode(0);
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break;
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/*
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|| This event is defined but not used in the code. No
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|| point in wasting codespace on it.
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|| case EV_RFU1:
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|| Serial.println(F("EV_RFU1"));
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|| break;
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*/
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case EV_JOIN_FAILED:
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Serial.println(F("EV_JOIN_FAILED"));
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break;
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case EV_REJOIN_FAILED:
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Serial.println(F("EV_REJOIN_FAILED"));
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break;
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break;
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case EV_TXCOMPLETE:
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Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
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if (LMIC.txrxFlags & TXRX_ACK)
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Serial.println(F("Received ack"));
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if (LMIC.dataLen) {
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Serial.println(F("Received "));
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Serial.println(LMIC.dataLen);
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Serial.println(F(" bytes of payload"));
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}
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// Schedule next transmission
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os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
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break;
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case EV_LOST_TSYNC:
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Serial.println(F("EV_LOST_TSYNC"));
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break;
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case EV_RESET:
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Serial.println(F("EV_RESET"));
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break;
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case EV_RXCOMPLETE:
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// data received in ping slot
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Serial.println(F("EV_RXCOMPLETE"));
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break;
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case EV_LINK_DEAD:
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Serial.println(F("EV_LINK_DEAD"));
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break;
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case EV_LINK_ALIVE:
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Serial.println(F("EV_LINK_ALIVE"));
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break;
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/*
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|| This event is defined but not used in the code. No
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|| point in wasting codespace on it.
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|| case EV_SCAN_FOUND:
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|| Serial.println(F("EV_SCAN_FOUND"));
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|| break;
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*/
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case EV_TXSTART:
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Serial.println(F("EV_TXSTART"));
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break;
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case EV_TXCANCELED:
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Serial.println(F("EV_TXCANCELED"));
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break;
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case EV_RXSTART:
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/* do not print anything -- it wrecks timing */
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break;
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case EV_JOIN_TXCOMPLETE:
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Serial.println(F("EV_JOIN_TXCOMPLETE: no JoinAccept"));
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break;
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default:
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Serial.print(F("Unknown event: "));
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Serial.println((unsigned) ev);
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break;
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}
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}
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void do_send(osjob_t* j){
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// Check if there is not a current TX/RX job running
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if (LMIC.opmode & OP_TXRXPEND) {
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Serial.println(F("OP_TXRXPEND, not sending update packet"));
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} else {
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mydata[0] = 0;
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// Prepare upstream data transmission at the next possible time.
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LMIC_setTxData2(1, mydata, sizeof(mydata), 0);
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Serial.println(F("Packet queued: Update Send"));
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}
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// Next TX is scheduled after TX_COMPLETE event.
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}
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bool async_send(){
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// Check if there is not a current TX/RX job running
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if (LMIC.opmode & OP_TXRXPEND) {
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Serial.println(F("OP_TXRXPEND, not sending async send yet"));
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return true;
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} else {
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mydata[0] = 1;
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// Prepare upstream data transmission at the next possible time.
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LMIC_setTxData2(1, mydata, sizeof(mydata), 0);
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Serial.println(F("Packet queued: Async Send"));
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return false;
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}
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// Next TX is scheduled after TX_COMPLETE event.
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}
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static volatile bool button_pushed;
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void push_button_ISR(){
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button_pushed = true;
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}
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void setup() {
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Serial.begin(9600);
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Serial.println("Starting");
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SPI.setMOSI(RADIO_MOSI_PORT);
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SPI.setMISO(RADIO_MISO_PORT);
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SPI.setSCLK(RADIO_SCLK_PORT);
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SPI.setSSEL(RADIO_NSS_PORT);
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// Configure User Button
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pinMode(USER_BTN, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(USER_BTN), push_button_ISR, HIGH);
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Serial.println("Setup Complete");
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// LMIC init
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os_init();
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// Reset the MAC state. Session and pending data transfers will be discarded.
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LMIC_reset();
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// allow much more clock error than the X/1000 default. See:
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// https://github.com/mcci-catena/arduino-lorawan/issues/74#issuecomment-462171974
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// https://github.com/mcci-catena/arduino-lmic/commit/42da75b56#diff-16d75524a9920f5d043fe731a27cf85aL633
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// the X/1000 means an error rate of 0.1%; the above issue discusses using values up to 10%.
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// so, values from 10 (10% error, the most lax) to 1000 (0.1% error, the most strict) can be used.
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LMIC_setClockError(1 * MAX_CLOCK_ERROR / 40);
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LMIC_setLinkCheckMode(0);
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LMIC_setDrTxpow(DR_SF7,14);
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LMIC_selectSubBand(6);
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// Start job (sending automatically starts OTAA too)
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do_send(&sendjob);
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}
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void loop() {
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if(button_pushed) {
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button_pushed = async_send();
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}
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os_runloop_once();
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}
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