Change frequency

[f1ssf]

Hello, my system is full operate on 868Mhz.
The radio range isn't very good with obstacles.
I would like to know the exact part number of the RA module needed to switch to 433MHz?
Thank you.

[AI-RedCode]

Hello f1ssf,

According to the README, the PirBOX-Lite firmware supports changing the LoRa frequency band by modifying the BAND setting in Config.h. You can set it to 433E6 (433 MHz) instead of the default 868E6.

Here is the relevant snippet from the config:

#define BAND 868E6     // Change to 433E6 for 433 MHz or 915E6 for 915 MHz

Regarding the exact RA module part number for 433 MHz, the README does not specify it directly. However, since PirBOX-Lite uses SX126x-based modules (like the Ra-01SH), you would need the SX126x LoRa transceiver module designed for 433 MHz.

You might want to check the hardware details of your current RA module or source an SX126x Ra-01SH module rated for 433 MHz.

For flashing the firmware with the new frequency, follow the programming instructions in the README.

If you need further details about the exact module part number, the author's shop or hardware repository might help: http://www.PricelessToolkit.com

Your radio range through obstacles might also benefit from adjusting other radio parameters like spreading factor and output power, also found in Config.h.

Hope this helps!

✅ If this answer helped, please close the discussion.
🤖 I’m an AI and If my response is incorrect or not sufficient, don’t worry @PricelessToolkit will review this discussion soon.

[PricelessToolkit]

Hi, before changing the LoRa module to "Ra-01SH", try to change "SPREADING_FACTOR" to a higher one. And how much the distance is?

[f1ssf]

about 500meters but somes obstacles (wall, and gate, trees)

[PricelessToolkit]

You can change the antenna on the gateway and change the spreading factor. to 11

[f1ssf]

Ok I test this week before, thank you

[f1ssf]

Actually my spreading factor is 10, but I see the BW is 250Khz, if I reduce BW to 125khz, I think the rf signal will be better ?

[PricelessToolkit]

No SF10 can't work with 125khz, try SF9 or SF11

//| Bandwidth | Supported Spreading Factors |
//|-----------|-----------------------------|
//| 125 kHz   | SF5 – SF9                   |
//| 250 kHz   | SF5 – SF10                  |
//| 500 kHz   | SF5 – SF11                  |

[f1ssf]

Thank's I have found this module, is it correcte for PIRBOX and CAPI?
Ra-01S LoRa Wireless RF Module with SX1268 Chip, 433MHz Ultra-Low Power Consumption, and Matching Antenna
Tnx's

[PricelessToolkit]

Modules for PirBox and CapiBridge are different, for PirBox, use "Ra-01S". For CapiBridge, it depends on the HW version.

[PricelessToolkit]

//#define LORA_MODULE LORA_MODULE_SX1276  // SX1276 Module (orders shipped before Aug 2025)
#define LORA_MODULE LORA_MODULE_SX1262  // SX1262 Module CapiBridge v2 (orders shipped after Aug 2025)

V2 version can use the same module "Ra-01S"

[f1ssf]

hello sorry to be late, many job. So I try your new code for Pirbox with 433 module, I have problem, code upload sucess, but pirbox LED is always ON and Lora no TXing. I have controled, build a nex PIRBOX, same defect.
Q1, Q2, Q3, U1,U3, IC2 are corrects, U14 is more difficult , system triger ?
I have tested alls wires, are corrects, RX solder on Atiny are corrects
Do you have an ideas for hardware test ? thank you

[PricelessToolkit]

I’ve ordered the RA-01S and should receive it next week, so I’ll build the same kit for testing. It’s difficult to provide useful help based on guesswork alone.