From 12dfdde9f9fdfdf40aa36e6915800659d8b60b56 Mon Sep 17 00:00:00 2001 From: test2 Date: Sun, 24 Nov 2019 17:42:57 +0200 Subject: [PATCH] pi2server --- IoT/SensorNode2Server.adoc | 170 ++++++++++++++++++++++++++++++++++++- 1 file changed, 169 insertions(+), 1 deletion(-) diff --git a/IoT/SensorNode2Server.adoc b/IoT/SensorNode2Server.adoc index 5ef275b..efcf116 100644 --- a/IoT/SensorNode2Server.adoc +++ b/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] +---- +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 $read +---- + + +Sends a string to the Arduino. + +.PHP code in Raspberry Pi - send +[source,php] +---- +deviceSet("/dev/ttyAMA0"); +$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]