ErriezOregonTHN128Receive.h File Reference

Oregon THN128 433MHz temperature receive library for Arduino. More...

#include <stdint.h>
#include "ErriezOregonTHN128.h"

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Functions
void	OregonTHN128_RxBegin (uint8_t extIntPin)
	Initialize receiver pin. More...
void	OregonTHN128_RxEnable ()
	Receive enable.
void	OregonTHN128_RxDisable ()
	Receive disable.
bool	OregonTHN128_Available (void)
	Check if data received. More...
bool	OregonTHN128_Read (OregonTHN128Data_t *data)
	Read data. More...

Detailed Description

Oregon THN128 433MHz temperature receive library for Arduino.

Source: https://github.com/Erriez/ErriezOregonTHN128 Documentation: https://erriez.github.io/ErriezOregonTHN128

Protocol:

Transmit temperature twice every 30 seconds:

Bit: 0 7 0 7 0 7 0 7 +-—+-—+---—+---—+---—+---—+ +-—+-—+---—+– |PREA|SYNC|Byte 0|Byte 1|Byte 2|Byte 3| |PREA|SYNC|Byte 0| ... +-—+-—+---—+---—+---—+---—+-—/\/-—+-—+-—+---—+– |<------------— 144ms ----------—>|<- 100ms ->| 30 sec

Logic '0': Logic '1': +-—+ +-—+ | | +-—+ +-—+ 1400 1500 1500 1400 (us)

PREA: Preamble 12x logic '1', 3000us low

SYNC: +-----—+ | |

• +-----—+ 5500us 5500us

Byte 0:

• Bit 0..3: Rolling address (Random value after power cycle)
• Bit 6..7: Channel: (0 = channel 1 .. 2 = channel 3)

Byte 1:

• Bit 0..3: TH3
• Bit 4..7: TH2

Byte 2:

• Bit 0..3: TH1
• Bit 5: Sign
• Bit 7: Low battery

Byte 3:

• Bit 0..7: CRC

Example: Rolling address = 5, channel = 1, temperature = 27.8 `C, low battery = false TH1 = 2, TH2 = 7, TH3 = 8: Byte 0: 0x05 Byte 1: 0x78 Byte 2: 0x02 Byte 3: 0x7f

Bits in time: PRE=1 S B0=0x05 B1=0x78 B2=0x02 B3=0x7f 111111111111 S 10100000 00011110 01000000 11111110

Definition in file ErriezOregonTHN128Receive.h.

Function Documentation

OregonTHN128_Available()

bool OregonTHN128_Available

(

void

)

Check if data received.

Return values

true	Data received
false	No data available

Definition at line 358 of file ErriezOregonTHN128Receive.c.

OregonTHN128_Read()

bool OregonTHN128_Read

(

OregonTHN128Data_t *

data

)

Read data.

Parameters

data	Structure OregonTHN128Data_t output

Return values

true	Data received
false	No data available

Definition at line 373 of file ErriezOregonTHN128Receive.c.

OregonTHN128_RxBegin()

void OregonTHN128_RxBegin

(

uint8_t

extIntPin

)

Initialize receiver pin.

Connect RX pin to an external interrupt pin such as INT0 (D2) or INT1 (D3)

Parameters

extIntPin

Definition at line 324 of file ErriezOregonTHN128Receive.c.