So you have to use this library in the target sketch. Maybe there is something wrong with that library. It'll connect you in a moment.
I have managed to edit the sketch and include the library I used to test the dht22. This now seems to be displaying the data in the app. Im just gonna have a play around with it and see how it is.
/*
Arduino, HM-10, App Inventor 2
Example Project Part 5: 3 leds and 3 switches
By Martyn Currey. www.martyncurrey.com
Turn LEDs on and off from an Android app via a HM-10 or from a physical switches connected to the Arduino
Uses the following pins
D10 - DHT22 data
D9 - AltsoftSerial RX
D8 - AltsoftSerial TX
D7 - LED + resistor
D6 - LED + resistor
D5 - LED + resistor
D4 - Button switch
D3 - Button switch
D2 - Button switch
*/
// AltSoftSerial uses D9 for RX and D8 for TX. While using AltSoftSerial D10 cannot be used for PWM.
// Remember to use a voltage divider on the Arduino TX pin / Bluetooth RX pin
// Download from https://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
// DHT22 uses D10 for data.
// Download from https://botland.com.pl/index.php?controller=attachment&id_attachment=1211
#include <AltSoftSerial.h>;
#include <DHT.h>;
#include <DHT_U.h>;
AltSoftSerial BTserial;
//Constants
#define DHTPIN 10 // what pin we're connected to
#define DHTTYPE DHT22 // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
// Variables used for incoming data
//Variables
int chk;
float hum; //Stores humidity value
float temp; //Stores temperature value
const byte maxDataLength = 20;
char receivedChars[21] ;
boolean newData = false;
// Constants for hardware
const byte SWITCH_PIN[] = {};
const byte LED_PIN[] = {2,3,4,5,6,7,11,12};
// general variables
boolean LED_State[] = {false,false,false,false};
boolean switch_State[] = {false,false,false,false};
boolean oldswitch_State[] = {false,false,false,false};
unsigned long memory_Time = 0;
void setup()
{
for (byte pin = 0; pin < 8; pin++)
{
// Set the button switch pins for input
pinMode(SWITCH_PIN[pin], INPUT);
// Set the LED pins for output and make them LOW
pinMode(LED_PIN[pin], OUTPUT); digitalWrite(LED_PIN[pin],LOW);
}
// open serial communication for debugging
Serial.begin(9600);
dht.begin();
Serial.print("Sketch: "); Serial.println(FILE);
Serial.print("Uploaded: "); Serial.println(DATE);
Serial.println(" ");
// open software serial connection to the Bluetooth module.
BTserial.begin(9600);
Serial.println("AltSoftSerial started at 9600");
newData = false;
} // void setup()
void loop()
{
for (byte switchNum = 1; switchNum < 1; switchNum++)
{
checkSwitch(switchNum);
}
recvWithStartEndMarkers(); // check to see if we have received any new commands
if (newData) { processCommand(); } // if we have a new command do something about it
delay(2000);
//Read data and store it to variables hum and temp
hum = dht.readHumidity();
temp= dht.readTemperature();
//Print temp and humidity values to serial monitor
Serial.print("Humidity: ");
Serial.print(hum);
Serial.print(" %, Temp: ");
Serial.print(temp);
Serial.println(" Celsius");
delay(10000); //Delay 2 sec.
if ((millis() - memory_Time) >= 1000UL){
BTserial.print(hum);
BTserial.print(",");
BTserial.println(temp);
memory_Time = millis();
}
}
/*
Function checkSwitch()
checks the status of a button switch and turns an LED on or off depending on the switch status
passed:
global:
switch_State[]
LED_State[]
oldswitch_State[]
Returns:
Sets:
switch_State[]
LED_State[]
oldswitch_State[]
*/
void checkSwitch( byte pos)
{
// pos = 1,2,3. Array pos = 0,1,2 so convert by subtracting 1
pos = pos-1;
// very simple debouce.
boolean state1 = digitalRead(SWITCH_PIN[pos]); delay(1);
boolean state2 = digitalRead(SWITCH_PIN[pos]); delay(1);
boolean state3 = digitalRead(SWITCH_PIN[pos]); delay(1);
if ((state1 == state2) && (state1==state3))
{
switch_State[pos] = state1;
if ( (switch_State[pos] == HIGH) && (oldswitch_State[pos] == LOW) )
{
LED_State[pos] = ! LED_State[pos]; // flip the status.
// Rather than have a long list of possible commands I create the command as required.
// Values in the temp command are replaced depending on which button switch has been pressed.
char TMPcmd[8] = "[L,1,0]";
TMPcmd[3] = pos+1+48; // pos+1 should be 1,2, or 3. convert a numeric value to ascii by adding 48.
TMPcmd[5] = LED_State[pos]+48; // LED_State should be 0 or 1
BTserial.print(TMPcmd);
digitalWrite(LED_PIN[pos],LED_State[pos]);
Serial.println(TMPcmd);
}
oldswitch_State[pos] = switch_State[pos];
}
}
/*
Function processCommand
parses data commands contained in receivedChars[]
receivedChars[] has not been checked for errors
passed:
global:
receivedChars[]
newData
Returns:
Sets:
receivedChars[]
newData
*/
void processCommand()
{
Serial.print("receivedChars = "); Serial.println(receivedChars);
if (receivedChars[0] == 'L') // do we have a LED command?
{
// we know the LED command has a fixed length "L10"
// and the value at pos 1 is the LED and the value at pos 2 is 0 or 1 (on/off).
// 0 and 1 is the same as LOW and HIGH so we can use 0/1 instead of LOW/HIGH
byte LEDnum = receivedChars[1] - 48; // convert ascii to value by subtracting 48
boolean LEDstatus = receivedChars[2] - 48;
digitalWrite(LED_PIN[LEDnum-1],LEDstatus);
LED_State[LEDnum-1] = LEDstatus;
}
receivedChars[0] = '\0';
newData = false;
}
// function recvWithStartEndMarkers by Robin2 of the Arduino forums
// See http://forum.arduino.cc/index.php?topic=288234.0
/*
Function recvWithStartEndMarkers
reads serial data and returns the content between a start marker and an end marker.
passed:
global:
receivedChars[]
newData
Returns:
Sets:
newData
receivedChars
*/
void recvWithStartEndMarkers()
{
static boolean recvInProgress = false;
static byte ndx = 0;
char startMarker = '[';
char endMarker = ']';
char rc;
if (BTserial.available() > 0)
{
rc = BTserial.read();
if (recvInProgress == true)
{
if (rc != endMarker)
{
receivedChars[ndx] = rc;
ndx++;
if (ndx > maxDataLength) { ndx = maxDataLength; }
}
else
{
receivedChars[ndx] = '\0'; // terminate the string
recvInProgress = false;
ndx = 0;
newData = true;
}
}
else if (rc == startMarker) { recvInProgress = true; }
}
}
issue now is I have lost control of relays 
about to give up hahah
/*
Arduino, HM-10, App Inventor 2
Example Project Part 5: 3 leds and 3 switches
By Martyn Currey. www.martyncurrey.com
Turn LEDs on and off from an Android app via a HM-10 or from a physical switches connected to the Arduino
Uses the following pins
D10 - DHT22 data
D9 - AltsoftSerial RX
D8 - AltsoftSerial TX
D7 - LED + resistor
D6 - LED + resistor
D5 - LED + resistor
D4 - Button switch
D3 - Button switch
D2 - Button switch
*/
// AltSoftSerial uses D9 for RX and D8 for TX. While using AltSoftSerial D10 cannot be used for PWM.
// Remember to use a voltage divider on the Arduino TX pin / Bluetooth RX pin
// Download from https://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
// DHT22 uses D10 for data.
// Download from https://botland.com.pl/index.php?controller=attachment&id_attachment=1211
#include <AltSoftSerial.h>
#include <DHT.h>
#include <DHT_U.h>;
AltSoftSerial BTserial;
// Variables used for incoming data
const byte maxDataLength = 20;
char receivedChars[21] ;
boolean newData = false;
float h; //Stores humidity value
float t; //Stores temperature value
// Constants for hardware
const byte SWITCH_PIN[] = {};
const byte LED_PIN[] = {2,3,4,5,6,7,11,12};
#define DHTPIN 10 // what pin we're connected to
#define DHTTYPE DHT22 // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
// general variables
boolean LED_State[] = {false,false,false,false};
boolean switch_State[] = {false,false,false,false};
boolean oldswitch_State[] = {false,false,false,false};
unsigned long memory_Time = 0;
void setup()
{
for (byte pin = 0; pin < 8; pin++)
{
// Set the button switch pins for input
pinMode(SWITCH_PIN[pin], INPUT);
// Set the LED pins for output and make them LOW
pinMode(LED_PIN[pin], OUTPUT); digitalWrite(LED_PIN[pin],LOW);
}
// open serial communication for debugging
Serial.begin(9600);
Serial.print("Sketch: "); Serial.println(__FILE__);
Serial.print("Uploaded: "); Serial.println(__DATE__);
Serial.println(" ");
// open software serial connection to the Bluetooth module.
BTserial.begin(9600);
dht.begin();
Serial.println("AltSoftSerial started at 9600");
newData = false;
} // void setup()
void loop()
{
for (byte switchNum = 1; switchNum < 1; switchNum++)
{
checkSwitch(switchNum);
}
recvWithStartEndMarkers(); // check to see if we have received any new commands
if (newData) { processCommand(); } // if we have a new command do something about it
// Read the humidity in %:
h = dht.readHumidity();
// Read the temperature as Celsius:
t = dht.readTemperature();
if ((millis() - memory_Time) >= 2000UL){
BTserial.print(h);
BTserial.print(",");
BTserial.println(t);
memory_Time = millis();
}
}
/*
Function checkSwitch()
checks the status of a button switch and turns an LED on or off depending on the switch status
passed:
global:
switch_State[]
LED_State[]
oldswitch_State[]
Returns:
Sets:
switch_State[]
LED_State[]
oldswitch_State[]
*/
void checkSwitch( byte pos)
{
// pos = 1,2,3. Array pos = 0,1,2 so convert by subtracting 1
pos = pos-1;
// very simple debouce.
boolean state1 = digitalRead(SWITCH_PIN[pos]); delay(1);
boolean state2 = digitalRead(SWITCH_PIN[pos]); delay(1);
boolean state3 = digitalRead(SWITCH_PIN[pos]); delay(1);
if ((state1 == state2) && (state1==state3))
{
switch_State[pos] = state1;
if ( (switch_State[pos] == HIGH) && (oldswitch_State[pos] == LOW) )
{
LED_State[pos] = ! LED_State[pos]; // flip the status.
// Rather than have a long list of possible commands I create the command as required.
// Values in the temp command are replaced depending on which button switch has been pressed.
char TMPcmd[8] = "[L,1,0]";
TMPcmd[3] = pos+1+48; // pos+1 should be 1,2, or 3. convert a numeric value to ascii by adding 48.
TMPcmd[5] = LED_State[pos]+48; // LED_State should be 0 or 1
BTserial.print(TMPcmd);
digitalWrite(LED_PIN[pos],LED_State[pos]);
Serial.println(TMPcmd);
}
oldswitch_State[pos] = switch_State[pos];
}
}
/*
Function processCommand
parses data commands contained in receivedChars[]
receivedChars[] has not been checked for errors
passed:
global:
receivedChars[]
newData
Returns:
Sets:
receivedChars[]
newData
*/
void processCommand()
{
Serial.print("receivedChars = "); Serial.println(receivedChars);
if (receivedChars[0] == 'L') // do we have a LED command?
{
// we know the LED command has a fixed length "L10"
// and the value at pos 1 is the LED and the value at pos 2 is 0 or 1 (on/off).
// 0 and 1 is the same as LOW and HIGH so we can use 0/1 instead of LOW/HIGH
byte LEDnum = receivedChars[1] - 48; // convert ascii to value by subtracting 48
boolean LEDstatus = receivedChars[2] - 48;
digitalWrite(LED_PIN[LEDnum-1],LEDstatus);
LED_State[LEDnum-1] = LEDstatus;
}
receivedChars[0] = '\0';
newData = false;
}
// function recvWithStartEndMarkers by Robin2 of the Arduino forums
// See http://forum.arduino.cc/index.php?topic=288234.0
/*
Function recvWithStartEndMarkers
reads serial data and returns the content between a start marker and an end marker.
passed:
global:
receivedChars[]
newData
Returns:
Sets:
newData
receivedChars
*/
void recvWithStartEndMarkers()
{
static boolean recvInProgress = false;
static byte ndx = 0;
char startMarker = '[';
char endMarker = ']';
char rc;
if (BTserial.available() > 0)
{
rc = BTserial.read();
if (recvInProgress == true)
{
if (rc != endMarker)
{
receivedChars[ndx] = rc;
ndx++;
if (ndx > maxDataLength) { ndx = maxDataLength; }
}
else
{
receivedChars[ndx] = '\0'; // terminate the string
recvInProgress = false;
ndx = 0;
newData = true;
}
}
else if (rc == startMarker) { recvInProgress = true; }
}
}It doesn't work because you added a loop delay. Avoid the "delay ()" command in the loop.
I just used the Arduino code you sent over and that has successfully done it and I have full control of everything.
This has been a big learning curve and I have learned a lot from this. Thank you for you help you have been brilliant.
Okay I will remember to avoid the delay in the future.
Next to look at RGB 
Again thank you very much
Well, I'm glad that it was gone. Give another challenge
I might take a day or two off this now 
Thanks again
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