add m0 wifi support

Author: bolandrm

README.md

@@ -3,9 +3,11 @@
 ## Building Project
 
 1. Ensure you're on (at least) version 1.6.13 of the Arduino IDE
-1. Unzip libraries file and place the contents in your Arduino user libraries folder.  (Usually `~/Documents/Arduino/libraries`)
+1. Place the contents of the libraries directory in your Arduino user libraries directory.  (Usually `~/Documents/Arduino/libraries`)
 1. Set up WICED Feather using [steps here](https://learn.adafruit.com/introducing-the-adafruit-wiced-feather-wifi/).
 1. Set up M0 Feather using [steps here](https://learn.adafruit.com/adafruit-feather-m0-basic-proto/setup).
+1. Set up M0 WiFi Feather using [steps here](https://learn.adafruit.com/adafruit-feather-m0-wifi-atwinc1500/using-the-wifi-module). Be sure to do the version check as described.
+1. In `user_config.h`, uncomment the appropriate line depending on which microprocessor board you are using.  Only one board type line in this file should be uncommented.
 
 ## Software
 
@@ -35,11 +37,16 @@
 - 10K ohm resistor
 - Male/Female Headers (cut to size)
 
-### WiFi
+### WICED WiFi
 
 - All base parts
 - [WICED WiFi Feather](https://www.adafruit.com/product/3056)
 
+### M0 WiFi
+
+- All base parts
+- [M0 WiFi Feather](https://www.adafruit.com/product/3010)
+
 ### Cellular/GSM(2G)
 
 - All base parts
@@ -48,6 +55,8 @@
 - [SIM800L GSM Breakout Module](http://www.ebay.com/itm/SIM800L-Quad-band-Network-Mini-GPRS-GSM-Breakout-Module-Ships-from-California-/172265821650?hash=item281bd7d5d2:g:97gAAOSwls5Y5qFG)
 
 
-### Headseek Featherwing Schematics
+### Headseek Featherwing Board
+
+https://oshpark.com/shared_projects/iJOnNry7
 
-TODO
+TODO: Upload schematics

config.cpp

@@ -6,7 +6,7 @@
 #include "rtc.h"
 #include "transmit.h"
 
-#ifdef TRANSMITTER_WIFI
+#ifdef HEATSEEK_FEATHER_WIFI_WICED
 char const* get_encryption_str(int32_t enc_type);
 #endif
 
@@ -107,6 +107,8 @@ void print_menu() {
   Serial.println("[v] Calibrate temperature sensor");
   #ifdef TRANSMITTER_WIFI
     Serial.println("[w] Setup wifi");
+  #endif
+  #ifdef HEATSEEK_FEATHER_WIFI_WICED
     Serial.println("[a] List nearby access points");
   #endif
   Serial.println("[i] Setup Cell ID");
@@ -218,6 +220,8 @@ void enter_configuration() {
           print_menu();
           break;
         }
+#endif
+#ifdef HEATSEEK_FEATHER_WIFI_WICED
         case 'a': {
           wl_ap_info_t ap_list[20];
           int networkCount = 0;
@@ -389,7 +393,7 @@ void update_last_reading_time(uint32_t timestamp) {
   Serial.println("updated last reading time");
 }
 
-#ifdef TRANSMITTER_WIFI
+#ifdef HEATSEEK_FEATHER_WIFI_WICED
 char const* get_encryption_str(int32_t enc_type)
 {
   // read the encryption type and print out the name:

heatseek_sensor.ino

@@ -2,6 +2,7 @@
 #include <DHT.h>
 #include <SD.h>
 #include <SPI.h>
+#include "user_config.h"
 #include "transmit.h"
 #include "config.h"
 #include "watchdog.h"

transmit.cpp

@@ -3,13 +3,18 @@
 #include "watchdog.h"
 #include <SD.h>
 
-#ifdef TRANSMITTER_WIFI
+#ifdef HEATSEEK_FEATHER_WIFI_WICED
   AdafruitHTTP http;
   bool wifiConnected = false;
   volatile bool response_received = false;
   volatile bool transmit_success = false;
 #endif
 
+#ifdef HEATSEEK_FEATHER_WIFI_M0
+  WiFiClient wifiClient;
+  bool wifiConnected = false;
+#endif
+
 #ifdef TRANSMITTER_GSM
   #include <avr/dtostrf.h>
 
@@ -121,7 +126,7 @@
   }
 #endif 
 
-#ifdef TRANSMITTER_WIFI
+#ifdef HEATSEEK_FEATHER_WIFI_WICED
   void force_wifi_reconnect(void) {
     wifiConnected = false;
   }
@@ -215,6 +220,76 @@
   }
 #endif
 
+#ifdef HEATSEEK_FEATHER_WIFI_M0
+  void force_wifi_reconnect(void) {
+    if (wifiConnected) {
+      wifiConnected = false;
+      WiFi.end();
+    }
+  }
+  
+  void connect_to_wifi() {
+    WiFi.setPins(8, 7, 4, 2);
+    
+    Serial.print("Please wait while connecting to:");
+    Serial.print(CONFIG.data.wifi_ssid);
+    Serial.println("... ");
+
+    int status = WL_IDLE_STATUS;
+
+    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
+    status = WiFi.begin(CONFIG.data.wifi_ssid, CONFIG.data.wifi_pass);
+    
+    while (status != WL_CONNECTED) {
+      delay(1000);
+      Serial.println("Establishing connection...");
+    }
+
+    wifiConnected = true;
+    Serial.println("Connected to WiFi");
+
+    Serial.print("SSID: ");
+    Serial.println(WiFi.SSID());
+  
+    // print the received signal strength:
+    long rssi = WiFi.RSSI();
+    Serial.print("signal strength (RSSI):");
+    Serial.print(rssi);
+    Serial.println(" dBm");
+
+    watchdog_feed();
+  }
+  
+  bool _transmit(float temperature_f, float humidity, float heat_index, uint32_t current_time) {
+    if (!CONFIG.data.cell_configured || !CONFIG.data.wifi_configured || !CONFIG.data.endpoint_configured) {
+      Serial.println("cannot send data - not configured");
+      return false;
+    }
+  
+    if (!wifiConnected) { connect_to_wifi(); }
+
+    HttpClient client = HttpClient(wifiClient, CONFIG.data.endpoint_domain, 80);
+
+    String contentType = "application/x-www-form-urlencoded";
+    String data = "temp=" + String(temperature_f, 3) + "&humidity=" + String(humidity, 3) + "&heat_index=" + String(heat_index, 3) + "&hub=" + CONFIG.data.hub_id + "&cell=" + CONFIG.data.cell_id + "&time=" + current_time + "&sp=" + CONFIG.data.reading_interval_s + "&cell_version=" + CODE_VERSION;   
+
+    Serial.print("Posting data: ");
+    Serial.println(data);
+
+    client.post(CONFIG.data.endpoint_path, contentType, data);
+
+    int statusCode = client.responseStatusCode();
+    String response = client.responseBody();
+  
+    Serial.print("Status code: ");
+    Serial.println(statusCode);
+    Serial.print("Response: ");
+    Serial.println(response);
+  
+    return statusCode == 200;
+  }
+#endif
+
 typedef struct {
   float temperature_f;
   float humidity;

transmit.h

@@ -1,15 +1,17 @@
 #ifndef TRANSMIT_H
 #define TRANSMIT_H
 
-#define CODE_VERSION "F-1.1.0"
+#define CODE_VERSION "F-1.2.0"
 
-#ifdef MCU_STM32F205RG
-  #define TRANSMITTER_WIFI
-#else
+#include "user_config.h"
+
+#ifdef HEATSEEK_FEATHER_CELL_M0
   #define TRANSMITTER_GSM
+#else
+  #define TRANSMITTER_WIFI
 #endif
 
-#ifdef TRANSMITTER_WIFI
+#ifdef HEATSEEK_FEATHER_WIFI_WICED
   #include <libmaple/iwdg.h>
   #include <adafruit_feather.h>
   #include <adafruit_http.h>
@@ -20,6 +22,16 @@
   #define TRANSMITS_PER_LOOP 20
 #endif
 
+#ifdef HEATSEEK_FEATHER_WIFI_M0
+  #include <ArduinoHttpClient.h>
+  #include <WiFi101.h>
+
+  #define DHT_DATA  A2
+  #define SD_CS     10
+  
+  #define TRANSMITS_PER_LOOP 20
+#endif
+
 #ifdef TRANSMITTER_GSM
   #include "Adafruit_FONA.h"
   #include <Adafruit_SleepyDog.h>
@@ -42,5 +54,5 @@ void clear_queued_transmissions();
 #ifdef TRANSMITTER_WIFI
 void force_wifi_reconnect();
 #endif
-
+  
 #endif

user_config.h

@@ -0,0 +1,3 @@
+//#define  HEATSEEK_FEATHER_CELL_M0
+#define  HEATSEEK_FEATHER_WIFI_M0
+//#define  HEATSEEK_FEATHER_WIFI_WICED

watchdog.cpp

@@ -1,22 +1,25 @@
 #include "watchdog.h"
-#include "transmit.h"
+
+#if defined(HEATSEEK_FEATHER_WIFI_M0) || defined(TRANSMITTER_GSM)
+  #include <Adafruit_SleepyDog.h>
+#endif
 
 void watchdog_init() {
-  #ifdef TRANSMITTER_WIFI
+  #ifdef HEATSEEK_FEATHER_WIFI_WICED
     iwdg_init(IWDG_PRE_256, 3500); // 30 second watchdog, 40kHz processor
   #endif
 
-  #ifdef TRANSMITTER_GSM
-    Watchdog.enable(30000);
+  #if defined(HEATSEEK_FEATHER_WIFI_M0) || defined(TRANSMITTER_GSM)
+    Watchdog.enable(16000);  // 16 seconds (this is the max supported)
   #endif
 }
 
 void watchdog_feed() {
-  #ifdef TRANSMITTER_WIFI
+  #ifdef HEATSEEK_FEATHER_WIFI_WICED
     iwdg_feed();
   #endif
 
-  #ifdef TRANSMITTER_GSM
+  #if defined(HEATSEEK_FEATHER_WIFI_M0) || defined(TRANSMITTER_GSM)
     Watchdog.reset();
   #endif
 }

watchdog.h

@@ -1,6 +1,8 @@
 #ifndef WATCHDOG_H
 #define WATCHDOG_H
 
+#include "transmit.h"
+
 void watchdog_init();
 void watchdog_feed();