From 9eb648c86c524048f711c07b4eb17fab2d322efd Mon Sep 17 00:00:00 2001
From: Constantine Karamichalis <ckaramihalis@gmail.com>
Date: Mon, 25 Jan 2021 14:45:54 +0200
Subject: [PATCH]

---
 reciever.py | 43 +++++++++++++++++++++++++++++++++
 slave.ino   | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 reciever.py
 create mode 100644 slave.ino

diff --git a/reciever.py b/reciever.py
new file mode 100644
index 0000000..a750da9
--- /dev/null
+++ b/reciever.py
@@ -0,0 +1,43 @@
+import smbus
+import time
+import re
+from datetime import datetime
+from influxdb import InfluxDBClient
+
+
+client = InfluxDBClient('192.168.1.6', 8086,  'test', 'test', 'sensor')
+
+
+bus = smbus.SMBus(1)
+address = 0x16
+
+while True:
+    try:
+        now = datetime.now()
+        data = ""
+        for i in range(0, 40):
+            data += chr(bus.read_byte(address));
+
+        date_time = now.strftime("%m/%d/%Y, %H:%M:%S")
+        file = open("sensor_logs", "a")
+        file.write(date_time +" "+ data + "\n")
+        file.close()
+        find_values = re.findall(r'[-]{0,1}[\d]*[\.][\d]+', data)
+        create_list = list(map(str,find_values))
+       # print (create_list)
+       # print(create_list[0])
+       # print(create_list[1])
+       # print(create_list[2])
+        x_value = (create_list[0])
+        y_value = (create_list[1])
+        z_value = (create_list[2])
+    
+        client.write(["logg,sensor_type=lilypad x_value="+x_value+",y_value="+y_value+",z_value="+z_value+""],{'db':'sensor'},204,'line')
+
+        print (date_time+ " " + data)
+        print("\n")
+        time.sleep(1);
+
+    except KeyboardInterrupt:
+        print("\n"+"Interrupt detected Stopping program")
+        exit(0)
diff --git a/slave.ino b/slave.ino
new file mode 100644
index 0000000..14393b7
--- /dev/null
+++ b/slave.ino
@@ -0,0 +1,69 @@
+#include <Wire.h>
+#include <stdlib.h>
+
+#define SLAVE_ADDRESS 0x16
+
+const int xpin = A0;                  // x-axis of the accelerometer
+const int ypin = A1;                  // y-axis
+const int zpin = A2;                  // z-axis (only on 3-axis models)
+int index = 0;
+char data[40];
+
+void setup() {
+  //Serial.begin(9600);
+  pinMode(xpin, INPUT);
+  pinMode(ypin, INPUT);
+  pinMode(zpin, INPUT);
+  // initialize i2c as slave
+  Wire.begin(SLAVE_ADDRESS);
+  Wire.onRequest(sendData);
+}
+
+void loop() {
+  // Nothing to do at last !!!!
+}
+
+void sendData() {
+  read_lilypad();
+  Wire.write(data[index]); 
+  index++;
+  if (index >= 40) {
+    index = 0;
+  }
+}
+
+//Function that reads the data from the Lilypad sensor
+void read_lilypad () {
+  int x_input = analogRead(xpin);
+  int y_input = analogRead(ypin);
+  int z_input = analogRead(zpin);
+
+  //zero_G is the reading we expect from the sensor when it detects
+  //no acceleration.  Subtract this value from the sensor reading to
+  //get a shifted sensor reading.
+  //float x_zero_G = 515.39;
+  //float y_zero_G = 508.57;
+  //float z_zero_G = 513.19;
+  
+  float x_zero_G = 401.01;
+  float y_zero_G = 407.15;
+  float z_zero_G = 474.69;
+
+  //scale is the number of units we expect the sensor reading to
+  //change when the acceleration along an axis changes by 1G.
+  //Divide the shifted sensor reading by scale to get acceleration in Gs.
+  float scale = 102.3;
+
+  //Calculate values and convert them to string
+
+  String x_value = String(((float)x_input - x_zero_G) / scale);
+  String y_value = String(((float)y_input - y_zero_G) / scale);
+  String z_value = String(((float)z_input - z_zero_G) / scale);
+  
+  //Putting all values to one string
+  String lilypad = "Lilypad x: " + x_value + " y: " + y_value + " z: " + z_value;
+  
+/*  Saving The string to an array to be send to master */
+  lilypad.toCharArray(data, 40);
+
+}
\ No newline at end of file