Add code to test I²C in practise

arduino/CMakeLists.txt

@@ -17,3 +17,6 @@ generate_arduino_firmware(WeatherStationLogger
 
 generate_arduino_firmware(WeatherStationWeb
       SKETCH WeatherStationWeb)
+
+generate_arduino_firmware(I2CPractise
+      SKETCH I2CPractise)

arduino/I2CPractise/I2CPractise.ino

@@ -0,0 +1,107 @@
+/*
+   Copyright (C) 2012 Nathanaël Restori
+
+   Permission is hereby granted, free of charge, to any person
+   obtaining a copy of this software and associated documentation
+   files (the "Software"), to deal in the Software without
+   restriction, including without limitation the rights to use, copy,
+   modify, merge, publish, distribute, sublicense, and/or sell copies
+   of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be
+   included in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+   SOFTWARE.
+
+*/
+
+#include <Wire.h>
+#include "Chronodot.h"
+
+#define CHRONODOT_ADDRESS 0x68
+
+static uint8_t bcd2bin (uint8_t val) { return val - 6 * (val >> 4); }
+
+void setup() {
+    Serial.begin(9600);
+
+    Wire.begin();
+
+    Serial.println("BEGIN transmission");
+
+    Wire.beginTransmission(CHRONODOT_ADDRESS);
+    Wire.write((byte)0);
+    Wire.endTransmission();
+
+    Wire.requestFrom(CHRONODOT_ADDRESS, 19);
+    byte blah[20];
+    int i;
+    for(i=0; i<20; i++) {
+        blah[i] = Wire.read();
+    }
+
+    Serial.println("END transmission");
+
+    uint8_t ss = bcd2bin(blah[0] & 0x7F);
+    uint8_t mm = bcd2bin(blah[1]);
+    uint8_t hh = bcd2bin(blah[2]);
+    uint8_t d = bcd2bin(blah[4]);
+    uint8_t m = bcd2bin(blah[5]);
+    uint16_t y = bcd2bin(blah[6]) + 2000;
+    float ttc  = (float)(int)blah[17];
+    byte portion = blah[18];
+    if(portion == 0b01000000) ttc += 0.25;
+    if(portion == 0b10000000) ttc += 0.5;
+    if(portion == 0b11000000) ttc += 0.75;
+    float degF  = (((ttc * 9.0) / 5.0) + 32.5);
+    int ttf  = (int)degF;
+    //return DateTime (y, m, d, hh, mm, ss, ttf, ttc);
+
+    Serial.println();
+    Serial.println("What\tByte\tCorrespondance");
+    Serial.println("------------------------------");
+    Serial.print("seconds\t"); Serial.print(blah[0]); Serial.print("\t"); Serial.println(ss);
+    Serial.print("minutes\t"); Serial.print(blah[1]); Serial.print("\t"); Serial.println(mm);
+    Serial.print("hours\t"); Serial.print(blah[2]); Serial.print("\t"); Serial.println(hh);
+    Serial.print("days\t"); Serial.print(blah[4]); Serial.print("\t"); Serial.println(d);
+    Serial.print("monthes\t"); Serial.print(blah[5]); Serial.print("\t"); Serial.println(m);
+    Serial.print("years\t"); Serial.print(blah[6]); Serial.print("\t"); Serial.println(y);
+    Serial.print("temp\t"); Serial.print(blah[17]); Serial.print("\t"); Serial.println(ttc);
+    Serial.print("temp\t"); Serial.print(blah[18]); Serial.print("\t"); Serial.println(portion);
+
+    Serial.println();
+    Serial.println("Byte\tContent");
+    Serial.println("---------------");
+    Serial.print("0\t"); Serial.println(blah[0]);
+    Serial.print("1\t"); Serial.println(blah[1]);
+    Serial.print("2\t"); Serial.println(blah[2]);
+    Serial.print("3\t"); Serial.println(blah[3]);
+    Serial.print("4\t"); Serial.println(blah[4]);
+    Serial.print("5\t"); Serial.println(blah[5]);
+    Serial.print("6\t"); Serial.println(blah[6]);
+    Serial.print("7\t"); Serial.println(blah[7]);
+    Serial.print("8\t"); Serial.println(blah[8]);
+    Serial.print("9\t"); Serial.println(blah[9]);
+    Serial.print("10\t"); Serial.println(blah[10]);
+    Serial.print("11\t"); Serial.println(blah[11]);
+    Serial.print("12\t"); Serial.println(blah[12]);
+    Serial.print("13\t"); Serial.println(blah[13]);
+    Serial.print("14\t"); Serial.println(blah[14]);
+    Serial.print("15\t"); Serial.println(blah[15]);
+    Serial.print("16\t"); Serial.println(blah[16]);
+    Serial.print("17\t"); Serial.println(blah[17]);
+    Serial.print("18\t"); Serial.println(blah[18]);
+    Serial.print("19\t"); Serial.println(blah[19]);
+}
+
+void loop() {
+    delay(1000);
+}

arduino/WeatherStationWeb/WeatherStationWeb.ino

@@ -40,7 +40,7 @@
 
 static uint8_t   mac[]      = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
 static IPAddress ip         = IPAddress(192, 168, 1, 210);
-static IPAddress timeserver = IPAddress(192, 43, 244, 18);
+static IPAddress timeserver = IPAddress(213, 239, 239, 164);
 
 P(indexHtml) = "<!DOCTYPE html><html><head><meta charset='utf-8'/"
                "><title>Station Météo</title><style>html, body{ba"
@@ -178,7 +178,9 @@ void sendNTPpacket() {
 
         Serial.println("Adjusting time");
         chronodot.adjust(DateTime(epoch));
+        return;
     }
+    Serial.println("No reponse");
 }
 
 void setup() {