pi2server

IoT/SensorNode2Server.adoc

@@ -79,7 +79,7 @@ image:./ssh-file-to-sd-card.jpg[alt="Create ssh file"]
 
 - Linux Users
 
-.sketch Create ssh file
+.Create ssh file
 [source,bash]
 ----
 sudo fdisk -l
@@ -178,10 +178,178 @@ It has the following options available:
 ----
 
 
+=== Arduino Uno Raspberry Pi Serial Communication
 
+==== Serial config on Raspi
 
 
+.config 1 (recommended)
+[source,bash]
+----
+whoami
+sudo usermod -a -G dialout pi
+reboot
+----
+
+This gives read/write permission for all users to the Raspberry Pi (potentially unsafe):
+
+.config 2
+[source,bash]
+----
+sudo chmod 777 /dev/ttyACM0
+----
+
+This provides some configuration for the Arduino serial connection:
+
+.configuration for the Arduino serial connection
+[source,bash]
+----
+sudo stty -F /dev/ttyACM0 cs8 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts
+----
+
+==== Reading in the arduino
+
+.handle the reading in the arduino
+[source,bash]
+----
+void loop() {
+    meas = analogRead(a);
+    if (Serial.available())
+    {
+        if (Serial.read() == '1')
+        {
+            Serial.println(meas);
+        }
+    }
+}
+----
+
+==== Python
+
+.Python code in Raspberry Pi
+[source,python]
+----
+import serial
+from datetime import datetime
+from time import sleep
+now = datetime.now()
+
+ser = serial.Serial('/dev/ttyACM0', 9600)
+ser.write("1".encode())
+sleep(0.05);
+s = ser.readline()
+
+file = open("dataset", "a")
+file.write(now.strftime("%Y-%m-%d %H:%M") + " Sensor Value:" + str(s)+ "\n")
+file.close()
+----
+
+==== PHP
+
+[NOTE]
+.PHP Class
+====
+https://gist.github.com/gravataLonga/6c89821b845d15e939a0/archive/0d0063684d388a8ff53df8e73e55f4cb1187d7cd.zip[Download Class]
+====
+
+.PHP code in Raspberry Pi - read
+[source,php]
+----
+<?php
+
+include "php_serial.class.php";
+
+$serial = new phpSerial();
+$serial->deviceSet("/dev/ttyACM0");
+$serial->confBaudRate(9600);
+$serial->confParity("none");
+$serial->confCharacterLength(8);
+$serial->confStopBits(1);
+$serial->confFlowControl("none");
+
+$serial->deviceOpen();
+$read = $serial->readPort();
+$serial->deviceClose();
 
+echo $read
+----
+
+
+Sends a string to the Arduino.
+
+.PHP code in Raspberry Pi - send
+[source,php]
+----
+<?php
+
+error_reporting(E_ALL);
+ini_set('display_errors', '1');
+include "php_serial.class.php";
+
+$serial = new phpSerial;
+$serial->deviceSet("/dev/ttyAMA0");
+$serial->confBaudRate(115200);
+$serial->confParity("none");
+$serial->confCharacterLength(8);
+$serial->confStopBits(1);
+$serial->deviceOpen();
+$serial->sendMessage("Hello from my PHP script, say hi back!");
+
+$serial->deviceClose();
+
+echo "I've sended a message! \n\r";
+----
+
+==== NodeJS
+
+[NOTE]
+====
+Read the writing carefully on your Raspberry Pi circuit board to confirm it indicates something like “Raspberry Pi 4 Model B” or “Raspberry Pi 2 Model B”. If in doubt, run the following command in the terminal:
+
+    $ uname -m
+
+If the result returned starts with **“armv6”**, you are running a Raspberry Pi based on the older ARMv6 chipset and the next Node.js installation step **will not work**; otherwise, you are ready for the next step.
+====
+
+
+.Install NodeJS
+[source,bash]
+----
+curl -sL https://deb.nodesource.com/setup_13.x | sudo -E bash -
+sudo apt install -y nodejs
+npm install raspi-serial
+----
+
+
+.Install NodeJS - armv6
+[source,bash]
+----
+cd ~
+wget http://nodejs.org/dist/v6.2.1/node-v6.2.1-linux-armv6l.tar.gz
+tar -xzf node-v6.2.1-linux-armv6l.tar.gz
+cd node-v6.2.1-linux-armv6l/
+sudo cp -R * /usr/local/
+export PATH=$PATH:/usr/local/bin
+npm install raspi-serial
+----
+
+
+.NodeJS code in Raspberry Pi - read
+[source,c]
+----
+mport { init } from 'raspi';
+import { Serial } from 'raspi-serial';
+ 
+init(() => {
+  var serial = new Serial();
+  serial.open(() => {
+    serial.on('data', (data) => {
+      process.stdout.write(data);
+    });
+    serial.write('Hello from raspi-serial');
+  });
+});
+----
 
 
 [appendix]