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Flask_PySerial.txt
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1.
Week 12: Application Programming
http://fab.cba.mit.edu/classes/863.14/people/juliana_nazare/project12.html
This week, I made a web interface to control my Fabduino. The interface allowed me to taggle the onboard LED on and off from the web. To do this, I used PySerial and Python’s web microframework, Flask.
First, I created the Arduino code to make the Arduino listen for input over serial. The code (shown below) listens for a ‘1’ or a ‘0’ char to be sent over the serial. If it recieves a ‘1’, it turns the LED on by setting to voltage to HIGH. If it recives a ‘0’, it turns the LED off by setting the voltage to LOW.
toggle.ino
void setup() {
Serial.begin(9600); // Set the baud rate
pinMode(13, OUTPUT); // Set the onboard LED to output
Serial.println("Ready");
}
void loop() {
char toggle = ' ';
if(Serial.available()){ // Only send data back if data has been sent
char toggle = Serial.read(); // Read the incoming data
if(toggle == '1'){
digitalWrite(13, HIGH); // Turn the LED on (HIGH is the voltage level)
}
if(toggle == '0'){
digitalWrite(13, LOW); // Turn the LED off (LOW is the voltage level)
}
}
delay(100); // delay for 1/10 of a second
}
Next, I created the Python code to send the ‘1’ or ‘0’ to the serial. I used Flask to make a simple (2 button) webpage that, when clicked, submitted a post request with either the value ‘ON’ or ‘OFF’ to the application.
toggle.py
import serial
from time import sleep
from flask import request
from flask import Flask
app = Flask(__name__)
@app.route("/", methods = ['POST', 'GET'])
def hello():
if request.method == 'POST':
print request.form['submit']
ser = serial.Serial('/dev/tty.usbserial-FTGS552S', 9600, timeout=1)
if request.form['submit'] == 'ON':
print '1'
ser.write('1')
elif request.form['submit'] == 'OFF':
print '0'
ser.write('0')
else:
pass # unknown
return '<form action="/" method="POST"><input type="submit" name="submit" value="ON"><input type="submit" name="submit" value="OFF"></form>'
if __name__ == "__main__":
app.run()
To run the program, first load the toggle.ino code onto the Fabduino. Next, run the python code using ‘python toggle.py’ and open up http://localhost:5000. Clicking the buttons on the screen turns the on-board LED on and off (:
"""
ser = serial.Serial('/dev/tty.usbserial-FTGS552S', 9600, timeout=1)
"""
2.
简易Python上位机之LED控制
https://segmentfault.com/a/1190000022704635
"""
ser = serial.Serial('COm10',115200,timeout=0.5) #打开指定串口
"""
3.
使用Python的pySerial模組進行序列通訊：連接電腦與Arduino和MicroPython
https://swf.com.tw/?p=1188
連接ESP8266控制板和電腦的方式有兩種：
Wi-Fi無線網路：把ESP8266當作感測器網路前端設備，傳送資料到網站伺服器；或者當作網站伺服器，提供API讓前端網頁取得感測數據。
序列通訊埠：透過USB序列埠跟電腦或者手機連線。
"""
接著使用WebREPL連線到D1 mini板，透過import ser_test執行序列通訊測試程式，相關操作說明請參閱《超圖解 Python 物聯網實作入門》第七章「序列埠通信」7-21頁。
"""
4.
pySerial
https://pythonhosted.org/pyserial/shortintro.html#opening-serial-ports
PyModbus - A Python Modbus Stack
https://pymodbus.readthedocs.io/en/latest/readme.html
5.
工业数据采集：Python通过Modbus 读取RS232，RS485数据
https://zhuanlan.zhihu.com/p/310544320
ModBUS又分为
Modbus RTU，ASCII：所有物理接口都是串行（Serial）通信口：RS232，RS422，RS485
Modbus TCP：接口是以太网口，也就是电脑上的网络口，用Ethernet或者internet来连接
工业数据采集：Python从OPC读、写设备实时数据so easy
https://zhuanlan.zhihu.com/p/295154634
工业数据采集：传感器+树莓派+网站完整实现设备实时数据可视化
https://zhuanlan.zhihu.com/p/270196679
工业4.0的理解和落地实施-工业数据采集
https://zhuanlan.zhihu.com/p/162724007
6.
以 Python 利用 pyModbusTCP 庫對 MODBUS TCP Server 資料進行搬移或運算
https://www.icdt.com.tw/main/index.php/2013-07-09-05-19-03/229-pymodbustcp-share
7.
开源一个c#上位机源码吧——串口调试助手
https://zhuanlan.zhihu.com/p/37437015
上位机是指可以直接发出操控命令的计算机，一般是PC/host computer/master computer/upper computer,屏幕上显示各种信号变化（液压，水位，温度等）。下位机是直接控制设备获取设备状况的计算机，一般是PLC/单片机single chip microcomputer/slave computer/lower computer之类的。上位机发出的命令首先给下位机，下位机再根据此命令解释成相应时序信号直接控制相应设备。下位机不时读取设备状态数据（一般为模拟量），转换成数字信号反馈给上位机。简言之如此，实际情况千差万别，但万变不离其宗：上下位机都需要编程，都有专门的开发系统。
8.
UR機器人上位機通信-python版（一）
https://www.twblogs.net/a/5edf44d173095c456693467b
9.
PLC, Arduino, and Raspberry Pi: What’s Right for Your Application?
https://www.linkedin.com/pulse/plc-arduino-raspberry-pi-whats-right-your-application-ira-sharp-jr
10.
EVALUATING RASPBERRY PI AS A PROGRAMMABLE LOGIC CONTROLLER
https://hackaday.com/2020/08/24/evaluating-raspberry-pi-as-a-programmable-logic-controller/
11.
Model-based control: Raspberry Pi vs programmable logic controllers
https://www.controlglobal.com/articles/2020/raspberry-pi-vs-plc-for-model-based-control/
12.
ROS.org
http://wiki.ros.org/motoman
http://wiki.ros.org/motoman_driver
https://www.motoman.com/en-us/about/y-blog/ros-enabled-ready-to-go
13.
Python modbus communcation reading words on Mitsubishi PLC using ModbusTcpClient library
https://stackoverflow.com/questions/43344968/python-modbus-communcation-reading-words-on-mitsubishi-plc-using-modbustcpclient
14.
MicroPython How To
https://github.com/maloyang/MicroPython-How-To/blob/master/MicroPython%20How%20to.ipynb
PLC & Python
https://github.com/maloyang/PLC-Python
Python工業4.0 - 工廠監控系統
https://github.com/maloyang/TCPY20180922_Python-industry-IoT