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--- projects:farmrobot:batteriemanagement [2021/03/21 18:29]
jonas [Modbus Python and Watson-IoT MQTT publish on Raspberry Pi 4B]
+++ projects:farmrobot:batteriemanagement [2021/03/21 19:02] (current)
jonas [Modbus Python and Watson-IoT MQTT publish on Raspberry Pi 4B]
@@ Line 104: / Line 104: @@
 ===== Modbus Python and Watson-IoT MQTT publish on Raspberry Pi 4B =====
-Using FTDI USB adapter which can be interfaced on /dev/ttyUSB0
+Using FTDI USB adapter which can be interfaced on /dev/ttyUSB0\\
+Adding the current user to the "dialout" user group to access serial interfaces without root permissions:
     sudo adduser pi dialout
+Installing prerequisites:\\
     sudo apt install python3
     wget https://bootstrap.pypa.io/get-pip.py
     sudo python3 get-pip.py
-    sudo pip install pymodbus
+    sudo pip install pymodbus\\
-\\
+ModbusSerialClient is the Modbus client that is used to interface the registers on the BMS:
     from pymodbus.client.sync import ModbusSerialClient
-Using IBM Watson IoT platform
+=== IBM Watson IoT platform ===
 Creating a new device and gathering credentials: https://q74k3e.internetofthings.ibmcloud.com/dashboard/devices/browse/
@@ Line 129: / Line 131: @@
     pip install wiotp-sdk
-Modbus communication implementation based on: https://github.com/clarkni5/tinybms/blob/master/python/tinybms.py
+Modbus communication implementation based on: https://github.com/clarkni5/tinybms/blob/master/python/tinybms.py\\
+=== Code: ===
 <file py pc_bms_modbus_mqtt.py>
 import numpy as np
@@ Line 224: / Line 227: @@
     sleep(10)
 </file>
-{{:projects:farmrobot:run_terminal.png?600|}}
+{{:projects:farmrobot:run_terminal.png|}}
-=== Receiving MQTT messages on Watson IoT platform ===
+==== Receiving MQTT messages on Watson IoT platform ====
+Received messages:\\
+{{:projects:farmrobot:watson_iot_received_messages.png?600|}}\\
+Raw status data available:\\
+{{:projects:farmrobot:watson_iot_raw_data.png?600|}}
+===== Web Interface to view and graph the data =====
+An easy way to set up a web interface is to host a node-red instance on a server, for example on a stationary Raspberry Pi 4, which can be accesses via network or can be made accessible with port forwarding from the internet.\\
+Setting up a Raspberry Pi 4B with docker and docker run portainer.
+Create a new Node-Red Stack with a compose file, which creates a node-red web instance on the device on port 1880.
+The ip adress is needed which can be requested with:
+    ifconfig
+<file yaml compose.yaml>
+version: "2"
+services:
+  node-red:
+    image: nodered/node-red:latest
+    environment:
+      - TZ=Europe/Berlin
+    ports:
+      - "1880:1880"
+    networks:
+      - node-red-net
+    volumes:
+      - ~/data/node-red:/data
+networks:
+  node-red-net:
+</file>
+The node-red webapp can then be accessed via [[http://ip-adress:1880]]\\
+The Node-RED Dashboard module is needed to display the data with node-red\\
+To install, click the Menu Button and choose "Manage palette". Click the "Install" tab and search for "node-red-dashboard".\\
+Then click on install and install in the pop-up window. Then return to the main view.\\
+{{:projects:farmrobot:node-red-palette.png?600|}}
 ===== Micropython implementation on espressiv ESP32 DevKitc v4 =====

FabLab Kamp-Lintfort

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