using rtl_433 and arduino module

[reda Y]

Hi all,

please, i want to read the data sent from 433MHz arduino module using rtl_433, in the image below the obtained result,

 

my question how can read the data sent ( i have sent 1 with arduino module below you can find the arduino sktech) 

Thanks in advance

arduino code : 

#include <RH_ASK.h>

RH_ASK driver(2000, 11, A0, 5);

void setup(){

    Serial.begin(115200);

    if (!driver.init()){

         Serial.println("init failed");

    }

}

const uint8_t len = 1;

uint8_t msg[len] = {1};

void loop(){

    driver.send(msg, len);

    driver.waitPacketSent();

    Serial.println("sent !");

    msg[len-1]++;

    delay(1000);

}

[Christian Z.]

What kind of receiver is that? A cheap 1-bit OOK receiver like this? https://www.amazon.com/dp/B076Q64MBQ/

Are you running the receiver on the Arduino and sending raw data to rtl_433 on a host? What kind of raw data are you sending?

Or do you want to add some recevier to the host running rtl_433?

[reda Y]

i'm using the RTL-SDR receiver 

[Christian Z.]

Ok, sorry. Yes, that makes sense. It looks like it is working fine!

Your question then is "how to I get the payload data from rtl_433", right?

What program do you want to read the payload data with?

A simple example could be

    rtl_433 -f 433.812M -s 1024k -R 67 -F json | your_program_that_reads_json

or perhaps

    rtl_433 -f 433.812M -s 1024k -R 67 -F csv | your_script_that_reads_csv

If your program is in Python I recommend

    rtl_433 -f 433.812M -s 1024k -R 67 -F syslog:127.0.0.1:1433

and then change e.g. examples/rtl_433_statsd_relay.py (remove everything statsd and replace "statsd.gauge" with "print".

[reda Y]

thanks very much,

yes this is my question exactly,

and i will create a python script to read the data, can you explain to me the last part please :

"and then change e.g. examples/rtl_433_statsd_relay.py (remove everything statsd and replace "statsd.gauge" with "print"."

thank you again,

[Christian Z.]

I'll add a simple Python example to rtl_433 for you, likely tomorrow, to explain in detail.

[reda Y]

great,

thanks brother,

[reda Y]

hi bro,

i got this result, no msg decoded !, and i dont know why,

 

[Christian Z.]

The table looks good. Your byte (len=1) is in "Payload". The fields "msg" and "codes" are ok to be emtpy, this decoder does not use them.

[reda Y]

thanks christian,

but how can i read the information, in this example i have sent bit 0 as information !!,

if i sent for exmple the number 25, how can i read it !!

thanks again

[Christian Z.]

Did you perhaps sent "0" (the string) instead of 0 (the number)? In ASCII 48 = 0, 49 = 1, ... https://en.wikipedia.org/wiki/ASCII

[reda Y]

i have sent 0 number, this is my code arduino :

#include <RH_ASK.h>

RH_ASK driver(2000, 11, A0, 5);

void setup(){

   Serial.begin(115200);

   if (!driver.init()){

        Serial.println("init failed");

   }

}

const uint8_t len = 1;

uint8_t msg[len] = {0};

void loop(){

   driver.send(msg, len);

   driver.waitPacketSent();

   Serial.println("sent !");

    msg[len-1]++;

   delay(1000);

}

[reda Y]

thanks a lot christian,

i have tried to send string "welcome", 

and i have recuperated the payload successfully, the payload is coded in asccii,

below a picture for that,

thanks again,

best regards

On Saturday, June 13, 2020 at 11:06:47 PM UTC+2, Christian Z. wrote:

[Christian Z.]

I have added a short and simple example for custom data handling now: https://github.com/merbanan/rtl_433/blob/master/examples/rtl_433_custom.py

For your use-case check for model == "RadioHead-ASK", maybe also check id, to, and from then handle data["payload"]

[reda Y]

great work,

thank you very much,