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TDS gravity sensor from DFrobot confirm failed when calibrate

#include <TFT_eSPI.h> #include <SPI.h> #define TFT_GREY 0x5AEB TFT_eSPI tft = TFT_eSPI(); #include <WiFi.h> #include <HTTPClient.h> #include <UrlEncode.h> #include...

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UID in not changing in the RFID

I have used UID changer code from MFRC522 library to change UID for a card. i am getting the following errors when i trying the code. "Card did not respond to 0x40 after HALT command. Are you sure it...

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Photo & Motion sensor issue

The code functions with every object working, but I have a delay issue that I cannot figure out and I believe it's something in the loop aspect of the code. Desired effect is that a photo sensor...

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Soil Moisture Sensor On and Off control

What code can i use for turning off a soil moisture sensor. My plan is when the soil moisture detected low moisture, it will automatically water itself but I also want a code to turn it off when...

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String formatting

I am trying to convert a code written for pic16f886 to Arduino. I am facing issues in string formatting. In PIC the code was char look(int a){ switch(a){ case 0: return '0'; case 1: return '1'; case...

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PCF8575 cannot control relay switching

Hi Guys, I am currently developing a project using esp32, but I encountered the problem of insufficient pins. I originally planned to use the PCF8575 module to add pins to control the relay, but I...

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Read RS232 data on arduino

I am using an radar which is based on rs232 output data. I use MAX232 to TTL convertor with arduino. Radar givs data in 14 byte in hex i want to read it on serial monitor. what can i do ,Below i use...

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Not reading anything from Toyota DLC3 port (OBD2), Help anyone!

Hi cory, Can I ask if anyone had any experiance working with Toyota DLC3 port to read CAN data? My car is a Toyota Avanza F601 2006 1st Generation Asian region. Below is my setup to try and read the...

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Python3 and Arduino communication - tutorial & template code suggestion

This is a draft for a future post in the tutorial category. Happy to get feedback before posting there. thx Hello everyone, As the use of Python is becoming more widespread in schools, many of you are...

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Problems with choosing a battery for our rover project ?

Hi, having a problem with choosing my battery for our rover project. The problem is we have 4 dc motors with stall current 60A at 24 V and we have 4 of these motors. Should I chose a battery with max...

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Connecting arduino nano

Hi, I'm new to using Arduino. Just installed IDE 2 and have tried to connect a Nano board to use as a tutorial board to learn. I've also tried to connect an ESP32 WROOM 32 board that I want to use...

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Arduino Uni R4 Minima digitalPinToInterrupt always returns valid

When I use digitalPinToInterrupt() with a non-interrupt pin even absurd ones like 50, it returns the pin I pass to the function versus returning -1 to let me know it's not an interrupt pin. Anyone...

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Engine Sensors with arduinoMega, need help

Hello everyone. I'm trying to read the engine sensors of an old car (not OBD or similar) with arduino mega. The problem is that the sensors are single-wire and threaded in the engine, so when I want...

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Excel Data Streamer - No Data

Running an Arduino Nano BLE Sense. Reads 4 sensors, analogWrites them to 4 PWM pins (Not sure if that's relevant), and in the meantime, prints all 4 to the serial monitor. They print to the serial...

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Artist needs help with push button motor functions

Hey everyone, I want to start off by saying I have zero knowledge in this area and am reaching out to hopefully find some assistance. I am an artist and have an idea for an art installation that...

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Ledc* problem in Arduino 2.2.1

I can't compile all ledc* commands in Arduino IDE 2.2.1. How to solve this? 4 posts - 2 participants Read full topic

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How to solder FS8205 MOSFET chip

Hello, I'm not sure if this is the right forum for this question, if not, my apologies in advnce but not sure where to post this otherwise. I designed a circuit board in Eagle and just had my part...

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Arduino library for Texas Instruments IWR6843

Are there any libraries that will allow me to communicate with IWR6843 in Arduino IDE with I2C ? 1 post - 1 participant Read full topic

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Connecting an Espon M-190G to Arduino Uno R3

Complete electronics newb here I'm trying to connect an Epson M-190G mechanism to my Arduino Uno R3. Mechanism datasheet - https://maximppl.com/mechanism-technical-sheet.pdf (Pin info on pg. 34)...

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Unable to Control Opta Relays with API requests

I am using an Opta connected to arduino cloud over wifi and cannot get http requests to function properly. What is the correct JSON supposed to look like in order to change property values? I am...

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