esp32

  1. bahram1992

    Android Question Problem in Recieve Data from Bluetooth ESP32 in B4A

    Hi, im using a ESP32 Bluetooth to send a number. i use bluetooth serial in esp32 arduino to send number. I can received this number in serial bluetooth terminal app in my phone. I need just receive and show this number in android phone. Time between send number is minimum 2 seconds but its...
  2. RockSmoke

    Android Question BLE DOESN'T CONNECT TO ESP32

    Good day to everyone. I uploaded the BLE EXAMPLE to my phone. The application scans BLE devices, sees esp32 but does not connect. but apps in google play successfully connect. Does anyone have an idea. Thanks
  3. T

    B4R Tutorial Node-Red MQTT controlling 8+8 digital Inp-Out and I2C ADC on ESP32

    Hi Here a sample program to control/monitor 8+8 digital Out-Inp, plus an I2C ADC. The program use the MQTT protocol. This program is an evolution of the previous one I posted. This version add the monitor of 8 digital Input and four analog input read by ADC (ADS1115).
  4. M

    Android Question Very strange SLOWNESS in BLE writeData

    Hi everyone, I'm trying to send a 900KB file to an ESP32 via BLE. Assume that the code on the ESP32 is working because i tested it using a React WebApp running in the PC browser, that connects to it over BLE and send the files. Everything works fine. However... i managed to port the same...
  5. freedom2000

    Share My Creation cheap solar panel system (solar tracker + MPPT charger)

    Hi all, It's quite a long time since I posted something in this section ... Here is my latest creation, it's a cheap solar panel that I have mounted on a solar tracker system. Added to this is a MPPT controller which is itself controlled by a B4A app 👍 It allows, data logging and...
  6. irhamnur00

    B4R Question ESP32 connected to Node-RED, but it can't receive a topic message input from the server

    I was just trying to make my first project with B4R. Also, I was a newbie in microcontroller programming. In this my first project, I make a dashboard in Node-RED to display a value from the ESP32 and to control the blue LED on ESP32. The value had been successfully sent, but until now the...
  7. M

    Wish ESPAsyncTCP library (multi client tcp server)

    Hi can anybody wrap this library. it make tcp server for multi client . b4r tcp server just can handle 1 client at the same time. thanks. Async TCP Library for ESP8266 Arduino Async TCP Library for ESP32 Arduino
  8. janderkan

    B4R Question Error after updating ESP32 boards

    My code is working fine using ESP32 boards version 1.0.6, but after upgrading to version 2.0.0 I get the following error when initializing second hardware serial port, E (64) uart: uart_set_pin(595): tx_io_num error ESP_ERROR_CHECK failed: esp_err_t 0xffffffff (ESP_FAIL) at 0x4008ba60 file...
  9. thetahsk

    B4R Library ESP32 Ping

    This is a B4R-ESP32 portation from https://github.com/marian-craciunescu/ESP32Ping Rename to rar and use winrar for decompression because rar attachment are not allowed. Sub Process_Globals Public Serial1 As Serial Private ping As ESP32Ping Private wifi As ESP8266WiFi End Sub...
  10. M

    B4R Question softwareserial on esp32

    hi i use softwareserial for esp32 but this error show. how can i fix it. or can any one wrap https://github.com/plerup/espsoftwareserial/ library. error was too character so i attach it.
  11. KMatle

    B4R Tutorial ESP32: Simple OTA/Update via WebServer

    This example (adapted from the Arduino examples under Arduino->File->Examples) - downloads a file from a server (exactly: the update file) - store this file to the filesystem (SPIFFS) - starts an update with the downloaded file How to use: - Compile this app with "default" options from the...
  12. moty22

    Share My Creation B4J App for ESP8266/32

    edited: connecting to www was added. B4J app for testing and setting ESP8266/32 using AT Commands. AT commands are used to test the module, set baud rate, check version, set RF power etc. The app also connects to a router. List of AT commands can be downloaded from here...
  13. M

    B4R Question esp32 does not receive UDP broadcast data

    hi. i use udp in b4a,b4j,b4r and it works fine when set client ip. i can send data to 192.168.1.255 from esp32 and all client windows and android can get all data. but my esp32 not get broadcast data just could get data when i send data to esp32 ip.(192.168.1.2) i think my modem access point...
  14. KMatle

    B4R Code Snippet Setting the hostname of an ESP32

    Important is this line: WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE); which seems to reset the settings. My ESP32 showed up as "Espressif" Private Sub SetHostName Dim bb() As Byte = "TheHostname" RunNative("SetHostName", bb) End Sub #if C void SetHostName(B4R::Object* o)...
  15. freedom2000

    Share My Creation useless automatic morse keyer coder/decoder

    Here is an application (or a system) using a very old morse straight keyer to encode/decode Morse automatically. As I said it is more or less useless... but I had a lot of fun doing this ! Please have a look to this video :
  16. janderkan

    B4R Library rCAN library

    This wraps the basic functions from CAN library by Sandeep Mistry . The library makes it simple to communicate between Arduinos AND ESP32s using a 2 wire CAN bus. (fx. 100KBS at 1000m) You have to use Arduino to install the library. It supports UNO, MEGA and ESP32. (Tested with all 3) You can...
  17. Y

    B4R Question Disable power saving in wifi mode "ESP32".

    Hello : I am trying to make tow esp32 communicate with each other throught network protocols. each esp32 connected to same router but when i ping from router to esp32 its show me delay and unstable latency when i search for this problem i see that i can fix it by disabling power save in wifi...
  18. M

    Bug? Strings and Bytes Quiz Crashes ESP32?

    So after a long break, I'm resuming some B4R projects and typically I like to refresh my memory on string usage on the platform (since that's the thing that usually gets me in trouble on ESPs). I have a ESP32 with built in OLED board and I was trying the Strings and Bytes quiz which basically...
  19. Sgdva

    Android Question ESP32 Wifi Communication

    Greetings! Summary I would like to have an android interface to send commands to the ESP32 wifi module. For this purpose, I would need to make the board be connected to the Wifi desired by the user, secondly retrieve the IP assigned in the network and finally send commands by the Android...
  20. Chris160179

    Wish M5Stack - ESP32 Support

    Hello every Body, is there someone how likes to write a Library or Wrapper for the M5Stack Board? Official Site: https://m5stack.com/ GitHub Project with Arduino Library and some cool examples: https://github.com/m5stack/M5Stack There are 3 Boards called "Cores": - ESP32 Basic Core IoT...
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