Hello Geeks, i have an RFID card Scanning System, I wanna include audio Output into this. What I wanna do is whenever an RFID card is Scanned, I want AUDIO output WELCOME "ANKIT" I don't wanna play any audio file like (.mp3, wav ,etc) so what I'm after is "TEXT TO SPEECH CONVERSION" AND I WANNA PLA...

https://github.com/DavidAntliff/esp32-owb thank you so much for this library but I'm still not able to use it. I'm well aware of library usage but can you provide me a simple code that just read one single DS18b20 sensor. without addressing and all. I'm just about to finish my project of water qual...

Hello geeks, For my water quality measurement project I have to send some sensors data to server. For Temperature I'm using Dallas temperature DA18b20 sensor. It works fine without WiFi connection but when I'm adding WiFi connection code sensor gives -127 May b this is a library issue or hardware is...

With those resistor values, the formula for pH in your code should now be . . . . pHValue = 4.24*voltage+Offset; My ESP32 ADC functions over the range 0.17V to 3.15V (corresponding to the digital range 0 to 4095). With that voltage divider in place, the range at the input to the voltage divider wou...

With the input of the pH meter circuit board shorted out (or the electrode in a solution with pH=7) the output should be close to +2 volts. It will not be exactly +2V due mainly to the tolerance of resistor values. That's why when setting up your meter you need to put a value for "Offset" into the ...

@Archibald @ Deouss can u give me a way to find maximum output voltage of my water sensors? https://www.dfrobot.com/wiki/index.php/PH_meter_V1.1_SKU:SEN0161 https://www.dfrobot.com/wiki/index.php/Analog_ORP_Meter(SKU:SEN0165) this sensor gives results with Arduino but until now I'm unable to get pro...

for my in-house product of RFID card attendance system in the office. I received a data from my server. I just want to do is when a valid card is scanned by an employee, I want to put a "welcome (name of employee )to atoz family" msg. there is "TALKIE" library, but this library only works for Arduin...

I would use a simple amplifier with max 5V output or adjusted to scale between 0-5V output. There's no need for an amplifier. The sensors already have outputs in the range 0V to 5V so the voltage must be a reduced, not amplified, before going into the ESP32. Another way is also to run it again thro...

Option 1 Set the ADC to 10 bit resolution and attenuation to 6dB. Then carefully adjust the resistors of the divider circuit so 5V input gives 1023 and 0V input gives 0. Look at the graph here under the first section titled "ADC Calibration". You need to carefully adjust the input resistor so with ...

Thank you for all the support. I able to read analog reading on my esp32 but, now is there any coding logic to make, 5v ADC count = 3.3v ADC count ??? this is because I want same analog counts for later on so I must have to find a way to convert or MAP my counts same as ARDUINO(5v 10 bit ADC). pleas...