Skip to main content

UART communication Raspberry Pi Pico to Raspberry Pi

I am trying to communicate with a raspberry pi pico with my raspberry pi 4 over uart. The below code does transmit data, but I am only receiving data from the print statement.

 import os
    import utime
    from machine import ADC
    
    temp_sensor = ADC(4) # Default connection of temperature sensor


def temperature():
    # get raw sensor data 
    raw_sensor_data = temp_sensor.read_u16()
    
    # convert raw value to equivalent voltage
    sensor_voltage = (raw_sensor_data / 65535)*3.3
    
    # convert voltage to temperature (celcius)
    temperature = 27. - (sensor_voltage - 0.706)/0.001721
    
    return temperature
    

#print setup information :
print("OS Name : ",os.uname())

uart = machine.UART(0, baudrate = 9600)
print("UART Info : ", uart)
utime.sleep(3)

while True:
    temp = temperature()
    print(str(temp))
    uart.write(str(temp))
           
    utime.sleep(1)

And the code on my raspberry pi 4 is:

import serial
import time
import numpy as np
import matplotlib.pyplot as plt

#ser = serial.Serial('COM14',9600)
ser = serial.Serial('/dev/ttyACM0', 9600)

time.sleep(1)


while True:
    # read two bytes of data
    #data = (ser.read(8))
    data = (ser.readline())
    # convert bytestring  to unicode transformation format -8 bit
    temperature = str(data).encode("utf-8")
    #print("Pico's Core Temperature : " + temperature + " Degree Celcius")
    print(temperature)

The output in the terminal on my RPI 4 is:

27.2332

26.443

26.443

26.564

There is an extra new line between. If I remove print(str(temp)) from the pico code I get nothing. I can put just about anything in uart.write(str(temp)) and still receive the print statement, but without the uart.write() I will receive nothing.



source https://stackoverflow.com/questions/69397785/uart-communication-raspberry-pi-pico-to-raspberry-pi
Labels:

Comments

Post a Comment

Popular posts from this blog

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

Confusion between commands.Bot and discord.Client | Which one should I use?

Whenever you look at YouTube tutorials or code from this website there is a real variation. Some developers use client = discord.Client(intents=intents) while the others use bot = commands.Bot(command_prefix="something", intents=intents) . Now I know slightly about the difference but I get errors from different places from my code when I use either of them and its confusing. Especially since there has a few changes over the years in discord.py it is hard to find the real difference. I tried sticking to discord.Client then I found that there are more features in commands.Bot . Then I found errors when using commands.Bot . An example of this is: When I try to use commands.Bot client = commands.Bot(command_prefix=">",intents=intents) async def load(): for filename in os.listdir("./Cogs"): if filename.endswith(".py"): client.load_extension(f"Cogs.{filename[:-3]}") The above doesnt giveany response from my Cogs ...
Post a Comment
Read more

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more