HC12 Receive data

Projects Programming
1

Hi There,Could you please help, I am using 2 HC12 TXRX where I am only Sending Data one way
sending a (distance ) value of 26 and on the receive side HC12read I am getting the values 50,54,13,10 repeating and noting the DEC value of 50 = 2 and 54 = 6, 13 = CR and 10 = LF whereas I only want the value of 26 seen in the receive program.
Attached are the relevant send/receive sketches whilst I realize there is a lot of extra lines in the sketches and are of possibly no use these are the result of trying different ways to do what I want and being a beginner.
Regards Doug

Tank_Pump_Send_R5_1.ino (3.45 KB)

Tank_Pump_Receive_R5.ino (2.21 KB)

2

Have a look at the examples in Serial Input Basics - simple reliable ways to receive data. There is also a parse example to illustrate how to extract numbers from the received text.

The technique in the 3rd example will be the most reliable.

You can send data in a compatible format with code like this

Serial.print('<'); // start marker
Serial.print(value1);
Serial.print(','); // comma separator
Serial.print(value2);
Serial.println('>'); // end marker

...R

3

Thank you for your reply, I tried running the example 3 as a stand alone sketch and entered text in the serial monitor and all I got was the message Arduino is Ready and nothing else.
In my situation I am only dealing with numbers ,and the received number when converted (26) be called distance so that the rest of the program can use this value (26).

4

DougC:
Thank you for your reply, I tried running the example 3 as a stand alone sketch and entered text in the serial monitor and all I got was the message Arduino is Ready and nothing else.

Without knowing exactly what you entered in the serial monitor I can't help.

...R

5

Hi again I think I have partly solved my problem, the value of" inString" is the value of distance from the Send Side but still need some help with line #55, could you please dot the i's and cross the T"s for me as I am at a loss of how to go about it.
"inString" is the distance value received by the "HC12" from the send sketch and I basicly want to replicate the send sketch in the receive sketch and to print on the serial monitor as well as the LCD.

I am at the desperate stage as I have spent many many hours to resolve my problem.
Your help would be greatly appreciated.
Doug

Tank_Pump_Send_R5_4.ino (3.58 KB)

Tank_Pump_Receive_R5_6.ino (2.72 KB)

6

DougC:
Hi again I think I have partly solved my problem,

I don't see any evidence that you have incorporated one of the examples in my link in Reply #1. Of course you are not obliged to, but they do work well.

...R

7

i am Sorry but I tried to my ability and could not get it to work for me, so went searching for other possibilities and that is what I came up with.
Regards Doug

8

DougC:
i am Sorry but I tried to my ability and could not get it to work for me,

In Reply #2 you said you had a problem and in Reply #3 I asked you for more information so I could help. But you did not respond.

...R

9

Hi again going back to example 3 (attached) I have changed the sketch to include the HC12 also Serial to

HC12 and added a new line 35 to make sure the HC12 was being read and on the Serial monitor I get the

attached, (Arduino sketch EX 3)

the numbers shown here I want to use these values as (distance) in my sketch..

Doug

Example_3_forum.ino (1.57 KB)

Arduino sketch EX 3.PNG
Arduino sketch EX 3.PNG255×531 7.46 KB

10

Image from Reply #8 so we don't have to download it. See this Simple Image Guide

Arduino sketch EX 3.PNG
Arduino sketch EX 3.PNG255×531 7.46 KB

...R

11

Please don't post pictures of text. Just copy and paste the text.

As I mentioned in Reply #3, without evidence of what you are sending I can't comment on the output.

My guess is that you are not providing the start- and end-markers.

...R