HM-10. BLE. Arduino UNO. Notify. Bluetooth. AT. IBeacon. Arrhythmia Home » Arduino Ble Library Hm-10 » HM-10. BLE. Arduino UNO. Notify. Bluetooth. AT. IBeacon. Arrhythmia Maybe your like Arduino Ble Master Slave Arduino Ble Mqtt Arduino Ble Multiple Clients Arduino Ble Nano 33 Arduino Ble Nano 33 Sense Loading HM-10. BLE. Arduino UNO. Notify. Bluetooth. AT. iBeacon. Arrhythmia Tutorials and Guides hm-10, registerforstrings, at, ble, notify Juan_Antonio July 13, 2020, 5:59pm 1 Hello friends, I bought a wonderful HM-10 module with BLE for only $ 2. I have written my experiences on this Spanish website (http://kio4.com/arduino/161_HM10_BLE.htm) and I would like to share a summary in this Community. I have used the BluetoothLE 20190701 extension. I have connected the module to an Arduino UNO hc10_3715×386 137 KB I tried to use these libraries, but they did not work for me in Arduino UNO. CurieBLE.h is for Arduino 101 (Curie). ArduinoBLE is for Arduino MKR WiFi 1010, Arduino UNO WiFi Rev .2, Arduino Nano 33 IoT, y Arduino Nano 33 BLE BLEPeripheral is for Arduino Nano BLE and chips nRF8001, nRF51822. Therefore, we will work without libraries. 4 Likes Problem reading Strings with app from Arduino BLE Send AT Commands to HM-10 via AI2 and print it's response in the app HM-10 not pairing Help me with converting my Bluetooth Classic Code to Bluetooth Low Energy Get data from dht22 with hm10 Receiving data from arduino into App inventor using HM-10 bluetooth module Problema con modulo bluetooth HM-10 I want to learn how to control hardware things Arduino NANO BLE 33 + accelerometer Android Receiving Large Values (>256) over Bluetooth - MSB and LSB Recepción de datos a través de BLE I can't communicate my Arduino with my app Connection problem HM10/App Inventor FAQ Section: BlueTooth/BLE and HM-10 Bluetooth string receiving problem (BLE) Juan_Antonio July 13, 2020, 6:00pm 2 1.- Get UUID Service and UUID Characteristic. We install the nRF Connect app that we find in the Google Play Store on our mobile. hm10_3300×510 60.9 KB Service: 0000ffe0-0000-1000-8000-00805f9b34fb Characteristic: 0000ffe1-0000-1000-8000-00805f9b34fb Notify. Read. Write. WriteNoResponse (therefore we will not be able to use the WriteWithResponse block, we will get the response through RegisterForStrings - Notify.) ...but...wait...wait...Name?...MLT-BT05...not an HM-10...it's a fake...it's a clon...it's a clon of a clon, in Spanish this means "emosido engañados". MLT-BT05 BLE module – a clone of a clone?? | Arik Yavilevich's blog Previously I covered the HM-10 Bluetooth Low Energy (BLE) module and its clone, the CC41-A. Those are two popular modules that allow simple BLE communication through a serial interface and are handy w but it doesn't matter, we continue. 2 Likes Can App Inventor send binary data to a device via BLE? Error 9011 in extension BluetoothLE: Unknown Characteristic Keypad that does not work Recepción de datos a través de BLE BluetoothLE1.DeviceFound? Juan_Antonio July 13, 2020, 6:00pm 3 2.- Final character of a message is NULL. p110i_UNO_HM10_ble_enviar.aia (183.8 KB) We are going to send a message (abcdefghijk) and get the bytes obtained in Arduino UNO. hm10_28900×681 204 KB // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); #define LED13 13 byte caracter = ""; // char caracter = ""; String mensaje = ""; void setup(){ Serial.begin(9600); HM10.begin(9600); pinMode(LED13, OUTPUT); } void loop(){ if(HM10.available()) { caracter = HM10.read(); Serial.println(caracter); mensaje = mensaje + caracter; if(caracter == NULL ) { Serial.println(mensaje); if (mensaje.indexOf("on13")>= 0){digitalWrite(LED13, HIGH);} if (mensaje.indexOf("off13")>= 0){digitalWrite(LED13, LOW);} mensaje = ""; delay(100); } } } Look byte caracter = ""; hm10_5759×514 22.8 KB The extension sends the message and at the end the NULL character. To obtain the characters we change these lines. // byte caracter = ""; char caracter = ""; BluetoothLE extension adds a NULL character by default We can remove this feature using the block NullTerminateStrings = false 2 Likes HM10 pairing problem BLE HC-08 sending to an Arduino ArduinoNano => SoftwareSerial => HM10 => AI2 See a list of Bluetooth LE by names (and not by address)? Need to send text to esp32 as new line When the output from my BLE app arrives on the arduino its just gibberish Configuración de Bloques Juan_Antonio July 13, 2020, 6:00pm 4 3.- Turn on-off 3 LEDs. Check LEDs Status. p110i_UNO_HM10_3LED.aia (186.6 KB) hm10_31300×501 70.3 KB hm10_301000×1585 427 KB hm10_17719×424 261 KB // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); #define LED11 11 #define LED12 12 #define LED13 13 char caracter = ""; String mensaje = ""; String estado = ""; void setup() { Serial.begin(9600); HM10.begin(9600); pinMode(LED11, OUTPUT); pinMode(LED12, OUTPUT); pinMode(LED13, OUTPUT); } void loop(){ if(HM10.available()) { caracter = HM10.read(); // Serial.println(caracter); mensaje = mensaje + caracter; if(caracter == NULL ) { Serial.println(mensaje); if (mensaje == "on11") {digitalWrite(LED11,HIGH); estado = "LED11 ON";} if (mensaje == "off11"){digitalWrite(LED11,LOW); estado = "LED11 OFF";} if (mensaje == "on12") {digitalWrite(LED12,HIGH); estado = "LED12 ON";} if (mensaje == "off12"){digitalWrite(LED12,LOW); estado = "LED12 OFF";} if (mensaje.indexOf("on13") >= 0){digitalWrite(LED13, HIGH); estado = "LED13 ON";} if (mensaje.indexOf("off13") >= 0){digitalWrite(LED13, LOW); estado = "LED13 OFF";} if (mensaje == "check"){ estado =""; if (digitalRead(LED11) == HIGH) {estado = "on11,";} else {estado = "off11,";} if (digitalRead(LED12) == HIGH) {estado = estado + "on12,";} else {estado = estado + "off12,";} if (digitalRead(LED13) == HIGH) {estado = estado + "on13";} else {estado = estado + "off13";} } HM10.print(estado.c_str()); mensaje = ""; delay(100); } } } Two ways: if (mensaje == "on11") this means if message is equal to "on11" if (mensaje.indexOf("on13") >= 0) this means if message contains "on13" RegisterForString (Notifiy), when the HM10.print... HM10.print(estado.c_str()); ... variable "estado" is automatically sent to the app, note that Clock is not required. Be careful, the MTU of the HM-10 is 20 bytes (package), the messages must be less than 19 bytes + NULL 2 Likes The question about making a BLE app Bluetooth communication error for hex decimal Error 507 does not turn on bluetooth Juan_Antonio July 13, 2020, 6:01pm 5 4.- Arrhythmia. Demo. p110_UNO_HM10_corazon.aia (186.2 KB) Arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats with a very irregular pattern. This Arduino code: // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); void setup(){ Serial.begin(9600); HM10.begin(9600); } void loop(){ String nivel = (String) random(90,100); int ritmo = random(400,1600); delay(ritmo); String mensaje = nivel + "," + (String) ritmo; Serial.println(mensaje); HM10.print(mensaje.c_str()); } create two random numbers, level (height) and rhythm, this is a variable delay. delay(ritmo); hm10_24356×616 62.6 KB We use RegisterForStrings (Notify). 2 Likes MIT CharMaker1 extension ultrasonic sensor data graph Two way Bluetooth/Arduino communication Juan_Antonio July 13, 2020, 6:01pm 6 5.- Floats numbers. p110_UNO_HM10_float.aia (184.6 KB) Sometimes we want to work with float numbers, in this example I perform the operation with float numbers and then convert it to String and send it as String. It receives number (mensaje) as String, converts it toFloat, performs the operation on float, converts the result and send String. flotante = 7.101031f * mensaje.toFloat() / 3.303071f; // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); char caracter = ""; String mensaje = ""; float flotante = 1.0f; void setup(){ Serial.begin(9600); HM10.begin(9600); } void loop(){ if(HM10.available()) { caracter = HM10.read(); mensaje = mensaje + caracter; if(caracter == NULL ) { Serial.println(mensaje); flotante = 7.101031f * mensaje.toFloat() / 3.303071f; Serial.println(flotante,7); // Muestra con 7 decimales. HM10.print(flotante,7); // Envía con 7 decimales. mensaje = ""; delay(100); } } } This lines: Serial.println(flotante,7); // Shows in Serial Monitor with 7 decimals. HM10.print(flotante,7); // Sends with 7 decimals. Convert flotante to String with 7 decimals. 2 Likes When the output from my BLE app arrives on the arduino its just gibberish Juan_Antonio July 13, 2020, 6:01pm 7 6.- AT commands. Only accept AT Command when Bluetooth device is not connected with remote device. Arduino code: // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); void setup(){ Serial.begin(9600); HM10.begin(9600); } void loop(){ if(HM10.available()){Serial.write(HM10.read());} if(Serial.available()) {HM10.write(Serial.read());} } Serial Monitor (9600 bauds) Command Description * ---------------------------------------------------------------- * AT Check if the command terminal work normally * AT+RESET Software reboot * AT+VERSION Get firmware, bluetooth, HCI and LMP version * AT+HELP List all the commands * AT+NAME Get/Set local device name * AT+PIN Get/Set pin code for pairing * AT+PASS Get/Set pin code for pairing * AT+BAUD Get/Set baud rate * AT+LADDR Get local bluetooth address * AT+ADDR Get local bluetooth address * AT+DEFAULT Restore factory default * AT+RENEW Restore factory default * AT+STATE Get current state * AT+PWRM Get/Set power on mode(low power) * AT+POWE Get/Set RF transmit power * AT+SLEEP Sleep mode * AT+ROLE Get/Set current role. * AT+PARI Get/Set UART parity bit. * AT+STOP Get/Set UART stop bit. * AT+START System start working. * AT+IMME System wait for command when power on. * AT+IBEA Switch iBeacon mode. * AT+IBE0 Set iBeacon UUID 0. * AT+IBE1 Set iBeacon UUID 1. * AT+IBE2 Set iBeacon UUID 2. * AT+IBE3 Set iBeacon UUID 3. * AT+MARJ Set iBeacon MARJ . * AT+MINO Set iBeacon MINO . * AT+MEA Set iBeacon MEA . * AT+NOTI Notify connection event . * AT+UUID Get/Set system SERVER_UUID . * AT+CHAR Get/Set system CHAR_UUID . * -----------------------------------------------------------------* Note: (M) = The command support slave mode only. * AT+ADVI Intervalo de Advertiser AT OK AT+HELP AT+VERSION MLT-BT05-V4.1 AT+NAMEMLT-BT05 +NAME=MLT-BT05 AT+PIN +PIN=123456 AT+PASS +PASS=123456 AT+BAUD +BAUD=4 (4---------9600) AT+LADDR +LADDR=88:25:83:F1:04:B4 AT+ADDR? +ADDR=88:25:83:F1:04:B4 AT+STATE +STATE=2 AT+PWRM +PWRM=1 (1:don’t auto sleep) AT+POWE +POWE=2 (2: 0dbm) AT+SLEEP (To awake send +80 random chars) AT+ROLE +ROLE=0 (0: Peripheral) AT+NOTI +NOTI=0 (Permitir o no notificaciones) AT+UUID (Set or Get UUID) +UUID=0xFFE0 AT+CHAR +CHAR=0xFFE1 AT+ADVI +ADVI=0 (0--- 100 ms) (Interval Advertiser) Valors default: +MARJ=0xFFE0 +MINO=0xFFE1 +ADVI=0 [Tiempo de Advertisen modo iBeacon] +IBEA=0 [Establecer/Quitar/Consultar modo iBeacon] +NOTI=0 +PWRM=1 ooooooooooooooooooo000oooooooooooooooooooooo - We can change UUID with AT commands AT+UUIDxxxxyyxxzzzz Service: 0000xxxx-0000-1000-8000-00805-F9B34FB Characteristic Read: 0000yyyy-0000-1000-8000-00805-F9B34FB Characteristic Write: 0000zzzz-0000-1000-8000-00805-F9B34FB Default: FFE0, FFE1, FFE2 Service: 0000FFE0-0000-1000-8000-00805-F9B34FB Characteristic Read: 0000FFE1-0000-1000-8000-00805-F9B34FB Characteristic Write: 0000FFE2-0000-1000-8000-00805-F9B34FB 2 Likes Juan_Antonio July 13, 2020, 7:58pm 8 7.- iBeacon. iBeacon did not work for me with App Inventor, but we will see it with another application. - Set iBeacon in module HM-10 with AT commands. AT+MARJ0x1A2B Set major number: 0x1A2B (hexadecimal) (Desde: 0x0001~0xFFFE, Default: 0x FFE0) AT+MINO0xF1E2 Set minor number: 0xF1E2 (hexadecimal) (Desde: 0x0001~0xFFFE, Default: 0x FFE1) AT+ADVI5 Advertisement interval: 5 (5 is 546.25 miliseconds) AT+IBEA1 Set iBeacon MODE [default AT+IBEA0] AT+PWRM0 [auto-sleep. (default AT+PWRM1] We go to the Google Play Store and install the app on our mobile Beacon Scanner - Aplicaciones en Google Play This app will scan for beacons near you! ✌️ For all Beacons: * The type of beacon (iBeacon, AltBeacon, Eddystone or RuuviTag) * The approximation of the distance with the beacon (this is based on the RSSI value received and is NOT accurate) * The beacon address and manufacturer code * The RSSI and TX values * The last time the beacon has been seen For iBeacons and AltBeacons: * UUID * Major * Minor For Eddystone-UID beacons: * NamespaceID * InstanceID * TLM data sent if any For Eddystone-URL... Free Look distance in meters, major, minor, UUID, 0x004C is Apple. El UUID of this iBeacon is: 74278BDA-B644-4520-8F0C-720EAF059935 We can change UUID iBeacon: AT+IBE074278BDA AT+IBE1B6444520 AT+IBE28F0C720E AT+IBE3AF059935 Check: AT+IBE0 AT+IBE1 AT+IBE2 AT+IBE3 oooooooo0000ooooooo I tried iBeacon with App Inventor, but it didn't work. hm10_271280×607 56.8 KB 2 Likes How to get 3 ir sensor data from arduino to app BluetoothLE - How to Scan for and Display Adverts Broadcast on Channels 37, 38, and 39? ChrisWard July 13, 2020, 8:23pm 9 Superb Juan 2 Likes Juan_Antonio July 13, 2020, 8:50pm 10 8.- PIO (Programed Input Output). Stand-alone PIO terminals do not work in this model MLT-BT05 But on the genuine HM-10 they do work. We can use the HM-10 Stand-alone module, that is, without connecting to the Arduino, independently. Look this Martyn Currey tutorial, he uses the genuine HM-10 in stand-alone mode, he can take the input and output signals from the HM-10's PIO terminals http://www.martyncurrey.com/hm-10-bluetooth-4ble-modules/ 1 Like Juan_Antonio July 13, 2020, 9:00pm 11 9.- Flash the Firmware on Clone HM-10 BLE Module using Arduino Uno. Are you a brave and rich person? You can try this: https://circuitdigest.com/microcontroller-projects/how-to-flash-the-firmware-on-cloned-hm-10-ble-module-using-arduino-uno 1 Like Juan_Antonio July 31, 2020, 7:10pm 12 10.- Two HM-10 connected to an Arduino UNO. p110_UNO_dos_HM10.aia (186.9 KB) hm10_DOS971×573 327 KB The code for BLE1 creates three random numbers: TemperatureBLE1 (10...60.000) with 3 decimals HumidityBLE1 (5...99.000) with 3 decimals interval_BLE1 (500...1000) The code for BLE2 creates three random numbers: TemperatureBLE2 (10...60.000) with 3 decimals HumidityBLE2 (5...99.000) with 3 decimals interval_BLE2 (500...2000) In the variable intervals it sends the information to the application through "RegisterForStrings" // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial BLE1(2, 3); // El TXD del módulo al pin 4 (RX) del Arduino. // El RXD del módulo al pin 5 (TX) del Arduino. SoftwareSerial BLE2(4, 5); long previousMillis_BLE1 = 0; long previousMillis_BLE2 = 0; int interval_BLE1 = 1000; int interval_BLE2 = 1000; void setup(){ Serial.begin(9600); BLE1.begin(9600); BLE2.begin(9600); } void loop(){ unsigned long currentMillis = millis(); if(currentMillis - previousMillis_BLE1 > interval_BLE1) { previousMillis_BLE1 = currentMillis; SendTo_BLE1(); interval_BLE1 = random(500,1000); } if(currentMillis - previousMillis_BLE2 > interval_BLE2) { previousMillis_BLE2 = currentMillis; SendTo_BLE2(); interval_BLE2 = random(500,2000); } } void SendTo_BLE1(){ float TemperatureBLE1 = random(10,60000)/1000.0; // 3 decimals float HumidityBLE1 = random(5,99000)/1000.0; Serial.print(TemperatureBLE1,3); Serial.print(","); Serial.println(HumidityBLE1,3); BLE1.print(TemperatureBLE1,3); BLE1.print(","); BLE1.print(HumidityBLE1,3); } void SendTo_BLE2(){ float TemperatureBLE2 = random(10,60000)/1000.0; // 3 decimals float HumidityBLE2 = random(5,99000)/1000.0; String temperatureBLE2 = String(TemperatureBLE2,3); String humidityBLE2 = String(HumidityBLE2,3); String mensajeBLE2 = temperatureBLE2 + "," + humidityBLE2; Serial.println(mensajeBLE2); BLE2.print(mensajeBLE2.c_str()); } Note that the send intervals are NOT made using the delay function. I have used two ways of sending information. In the Blocks code, notice that I have used the same UUIDs for the two modules. hm10_DOS2907×2622 344 KB 1 Like Juan_Antonio August 1, 2020, 2:09pm 13 11.- WriteBytes and WriteStrings. p110i_UNO_hm10_WriteBytes.aia (199.2 KB) hm10_40856×413 91.2 KB We convert text list ["65","66","67","68","69","70"] to number list_n. [65,66,67,68,69,70] Send this list_n with "WriteBytes". We can also send with "WriteStrings". Notice that WriteStrings adds the NULL character. If you want to avoid it, use the NullTerminateStrings block. // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); byte caracter = ""; // char caracter = ' '; void setup(){ Serial.begin(9600); HM10.begin(9600); } void loop(){ if(HM10.available()) { caracter = HM10.read(); Serial.println(caracter); } } hm10_41677×1336 94.7 KB 1 Like Can App Inventor send binary data to a device via BLE? Keypad that does not work Juan_Antonio December 29, 2020, 6:41pm 14 12.- Keypad in App sends number to Arduino & HM-10, show in LCD-I2C. p110i_UNO_hm10_LCD.aia (192.5 KB) This example is based on this topic. A keypad sends a number of less than 5 digits by BLE HM-10 to Arduino UNO and is displayed on an LCD-I2C hc10_511138×468 197 KB // http://kio4.com/arduino/161_HM10_BLE.htm #include <Wire.h> // Pantalla LCD #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); // byte caracter = ""; char caracter = ""; String mensaje = ""; void setup(){ Serial.begin(9600); HM10.begin(9600); lcd.begin(16,2);// Columnas y filas de LCD. } void loop(){ if(HM10.available()) { caracter = HM10.read(); // Serial.println(caracter); mensaje = mensaje + caracter; if(caracter == NULL ) { Serial.println(mensaje); mensaje = mensaje.substring(0, mensaje.length() - 1); // Delete last char lcd.clear(); lcd.setCursor(0,0); lcd.print(mensaje); mensaje = ""; delay(100); } } } hm10_teclado726×1228 90.6 KB 1 Like Keypad that does not work z200z August 4, 2021, 10:32am 15 My Bluetooth app display component error, Bluetooth le1 connection error, calling registerforstrings of Bluetooth le1 failed Juan_Antonio August 4, 2021, 3:31pm 16 Are you using Arduino UNO and HM-10? Does the second example of this topic (LED) work for you? 1 Like Juan_Antonio October 13, 2021, 5:41pm 17 13.- HM-10 sends a long text to app. p110_UNO_HM10_TextoLargo.aia (185.3 KB) hm10_68360×638 53.8 KB HM-10 sends five random numbers with decimals, each random delay (500 - 1000 ms) It sends the data separated by commas and ends the message with the '#' character. // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial BLE1(2, 3); long previousMillis_BLE1 = 0; int interval_BLE1 = 1000; void setup(){ Serial.begin(9600); BLE1.begin(9600); } void loop(){ unsigned long currentMillis = millis(); if(currentMillis - previousMillis_BLE1 > interval_BLE1) { previousMillis_BLE1 = currentMillis; SendTo_BLE1(); interval_BLE1 = random(500,1000); } } void SendTo_BLE1(){ float x1 = random(10,60000)/1000.0; // 3 decimals float x2 = random(5,99000)/100.0; // 2 decimals float x3 = random(5,99000)/10.0; // 1 decimal float x4 = random(50,990000)/1000.0; // 3 decimals float x5 = random(500,990000)/1000.0; // 3 decimals BLE1.print(x1,3); BLE1.print(","); BLE1.print(x2,2); BLE1.print(","); BLE1.print(x3,1); BLE1.print(","); BLE1.print(x4,3); BLE1.print(","); BLE1.print(x5,3); BLE1.print(","); BLE1.print("#"); // End Of Message. } App receives this information in packets of 20 characters in stringValues, for example: (19.650,729.62,4154.3)(,584.019,279.315,#) The total variable accumulates the information until it contains the character '#' Cleans the information and makes it list. 19.650,729.62,4154.3,584.019,279.315, # (19.650 729.62 4154.3 584.019 279.315 #) hm10_67831×1674 135 KB hm10_69715×386 253 KB (*) Another way, send the last number using println() BLE1.println(x5,3); // BLE1.print(","); // BLE1.print("#"); // End Of Message. and modify the block piece: \n hm10_70790×329 26.3 KB 1 Like HELP ... Using Bluetooth BLE HM-10 got error Index list too large Juan_Antonio October 14, 2021, 2:24pm 18 14.- App sends a long text to HM-10. p110_UNO_HM10_TextoLargo_2.aia (184.6 KB) hm10_72362×636 46.7 KB hm10_74926×329 37.5 KB Clock1.TimeInterval: 10 hm10_73737×1259 94 KB // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial HM10(2, 3); String texto; void setup(){ Serial.begin(9600); BLE1.begin(9600); } void loop(){ if(BLE1.available()) { texto = BLE1.readString(); Serial.print(texto); } } 3 Likes Juan_Antonio July 2, 2022, 7:22pm 19 15.- Pushbutton in Arduino sends (1) or (0) to App. p110_UNO_boton_HM10.aia (184.2 KB) hm10_75729×411 259 KB When you press the Pushbutton7, (1) or (0) is sent to the app. As it receives (1) or (0) it will change the color of the btn_color to green or red. Notification (RegisterForString) is used. // Juan A. Villalpando // http://kio4.com/arduino/161_HM10_BLE.htm #include <SoftwareSerial.h> // El TXD del módulo al pin 2 (RX) del Arduino. // El RXD del módulo al pin 3 (TX) del Arduino. SoftwareSerial BLE1(2, 3); int valor = HIGH; int valor_anterior = HIGH; void setup(){ Serial.begin(9600); BLE1.begin(9600); pinMode(7,INPUT); } void loop(){ valor = digitalRead(7); if (valor == HIGH && valor_anterior != HIGH) { Serial.println("Pulsado"); valor_anterior = valor; BLE1.print("1"); delay(10); } if (valor == LOW && valor_anterior != LOW) { Serial.println("NO"); valor_anterior = valor; BLE1.print("0"); delay(10); } } hm10_77569×669 105 KB hm10_76812×1149 88.1 KB 1 Like I can't communicate my Arduino with my app ABG November 30, 2022, 7:22pm 20 (added to FAQ) FAQ Section: BlueTooth/BLE and HM-10 Frequently Asked Questions http://www.martyncurrey.com/arduino-hm-10-and-app-inventor-2/ HM-10 BLE Android App using HM10 & AI2 only. NO ARDUINO - Tom Donnelly HM-10. BLE. Arduino UNO. Notify. Bluetooth. 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