A01NYUB with Mycodo on a Raspberry pi 2B
Panos.Takis 2023-01-10 09:45:56 571 Views2 Replies Hello!
1) I am trying to connect a A01NYUB ultrasonic distance sensor, to a raspberry pi running mycodo, so I can monitor and control the water tank level.
As I have no previous experience with electronics and coding and having no idea where to ask I thought I should give it a try here.
If this is not the place, please let me know where should I look/ask.
2) Is there a way to connect (combine) more than 1 UART sensors on a raspberry pi in one pair of pins? I thought of using a UART to usb converter to overcome this issue but I will still need drivers and coding.
Thanks!
The solution I got for 2) is a “Gravity: I2C to Dual UART Module”. https://www.dfrobot.com/product-2001.html
Thanx for the help
Panos.Takis WALKAROUND
For the moment I found a way to get measurements from the sensor. I used the BASH Command input
First you need to make some changes.
Go to directory
“/home/username/DFRobot_RaspberryPi_A02YYUW/examples/” (replace username with username you chose when installing Raspbian)
Make a safe copy of the original file “demo_get_distance.py”
Cp demo_get_distance.py demo_get_distance.py.bkp
then
Sudo nano demo_get_distance.py
Delete all and Paste the following
# -*- coding:utf-8 -*-
'''!
@file demo_get_distance.py
@brief Get ranging data.
@n Connect board with raspberryPi.
@n --------------------------------------------
@n sensor pin | raspberry pi |
@n VCC | 5V/3V3 |
@n GND | GND |
@n RX | (BCM)14 TX |
@n TX | (BCM)15 RX |
@n --------------------------------------------
@n
@Copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
@license The MIT License (MIT)
@author [Arya]([email protected])
@version V1.0
@date 2019-8-31
@url https://github.com/DFRobot/DFRobot_RaspberryPi_A02YYUW
'''
import sys
import os
import time
sys.path.append(os.path.dirname(os.path.dirname(os.path.realpath(__file__))))
from DFRobot_RaspberryPi_A02YYUW import DFRobot_A02_Distance as Board
board = Board()
def print_distance(dis):
if board.last_operate_status == board.STA_OK:
print("%d" %dis)
elif board.last_operate_status == board.STA_ERR_CHECKSUM:
print("ERROR")
elif board.last_operate_status == board.STA_ERR_SERIAL:
print("Serial open failed!")
elif board.last_operate_status == board.STA_ERR_CHECK_OUT_LIMIT:
print("Above the upper limit: %d" %dis)
elif board.last_operate_status == board.STA_ERR_CHECK_LOW_LIMIT:
print("Below the lower limit: %d" %dis)
elif board.last_operate_status == board.STA_ERR_DATA:
print("No data!")
if __name__ == "__main__":
#Minimum ranging threshold: 0mm
dis_min = 0
#Highest ranging threshold: 4500mm
dis_max = 4500
board.set_dis_range(dis_min, dis_max)
distance = board.getDistance()
print_distance(distance)
Save and exit
These changes return one single value so mycodo can use store and display it.
Create a bash file in home directory for example. I named it A01NYUB.sh
Open it and Pastethe following:
#!/bin/bash
python3 /home/username/DFRobot_RaspberryPi_A02YYUW/examples/demo_get_distance.py
replace username with username you chose when installing Raspbian
save and close
from a termina run
chmod +x /home/username/A01NYUB.sh
replace username with username you chose when installing Raspbian
And last step
on mycodo go to Setup/Input
Choose from the dropdown menu “Linux Bash Command: Return Value [Mycodo]”
In the window that opens
In Options section in the Command box paste
./A01NYUB.sh
In Custom options in the box User enter username you chose when installing Raspbian
And next to it in Current working directory type
/home/username/
replace username with username you chose when installing Raspbian
click save ad then click close
Activate the input you just added
Done
Panos.Takis 
