LoRa Frequency Reference

The Wireless Tracker supports multiple regional frequency plans. Choose the correct model and configuration for your location.

Product Models

Model	Frequency Range	Regions
Wireless Tracker-LF	470-510 MHz	China (CN470), EU433
Wireless Tracker-HF	863-928 MHz	EU868, US915, AU915, AS923, KR920, IN865

Caution

Using incorrect frequencies is illegal in most countries. Verify local regulations before transmitting.

Regional Specifications

EU868 (Europe)

Parameter	Value
Frequency Range	863-870 MHz
Default Channels	868.1, 868.3, 868.5 MHz
Max TX Power	+14 dBm (25 mW) ERP
Duty Cycle	1% (36 sec/hour)
Listen Before Talk	Required for some bands

Channel Plan:

Channel	Frequency	Duty Cycle
0	868.1 MHz	1%
1	868.3 MHz	1%
2	868.5 MHz	1%
3-7	User defined	Varies

US915 (North America)

Parameter	Value
Frequency Range	902-928 MHz
Uplink Channels	64 (125 kHz) + 8 (500 kHz)
Downlink Channels	8 (500 kHz)
Max TX Power	+30 dBm (1 W) EIRP
Duty Cycle	None (FCC Part 15)

Sub-Band Configuration:

Most networks (TTN, Helium) use Sub-Band 2 (FSB2):

Sub-Band	Channels	Frequencies
FSB1	0-7	902.3-903.7 MHz
FSB2	8-15	903.9-905.3 MHz
FSB3	16-23	905.5-906.9 MHz
FSB4	24-31	907.1-908.5 MHz
FSB5	32-39	908.7-910.1 MHz
FSB6	40-47	910.3-911.7 MHz
FSB7	48-55	911.9-913.3 MHz
FSB8	56-63	913.5-914.9 MHz

Channel Mask for FSB2:

uint16_t userChannelsMask[6] = { 0xFF00, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 };

AU915 (Australia)

Parameter	Value
Frequency Range	915-928 MHz
Uplink Channels	64 (125 kHz) + 8 (500 kHz)
Max TX Power	+30 dBm EIRP
Duty Cycle	None

Similar to US915 but with different default sub-band. TTN Australia uses FSB2.

AS923 (Asia)

Parameter	Value
Frequency Range	920-925 MHz
Default Channels	923.2, 923.4 MHz
Max TX Power	+16 dBm (varies by country)
Dwell Time	400 ms max

AS923 Sub-types:

Variant	Countries
AS923-1	Japan, Singapore, Indonesia
AS923-2	Vietnam, Malaysia
AS923-3	Philippines
AS923-4	Israel

CN470 (China)

Parameter	Value
Frequency Range	470-510 MHz
Uplink Channels	96
Max TX Power	+17 dBm
Model Required	Wireless Tracker-LF

Note

CN470 requires the LF (Low Frequency) model. The HF model cannot transmit on these frequencies.

KR920 (South Korea)

Parameter	Value
Frequency Range	920-923 MHz
Channels	920.9, 921.1, 921.3, 921.5, 921.7, 921.9 MHz
Max TX Power	+14 dBm
Listen Before Talk	Required

IN865 (India)

Parameter	Value
Frequency Range	865-867 MHz
Channels	865.0625, 865.4025, 865.985 MHz
Max TX Power	+30 dBm EIRP
Duty Cycle	None

SX1262 RF Specifications

Transmit Power

Frequency Band	Max Power
470-510 MHz	21 ±1 dBm
867-870 MHz	21 ±1 dBm
902-928 MHz	21 ±1 dBm

Receiver Sensitivity

Bandwidth	Spreading Factor	Sensitivity
125 kHz	SF12	-135 dBm
125 kHz	SF10	-130 dBm
125 kHz	SF7	-124 dBm
250 kHz	SF7	-121 dBm
500 kHz	SF7	-118 dBm

Data Rate Configuration

EU868 Data Rates

DR	Config	Bit Rate	Max Payload
0	SF12/125	250 bps	59 bytes
1	SF11/125	440 bps	59 bytes
2	SF10/125	980 bps	59 bytes
3	SF9/125	1760 bps	123 bytes
4	SF8/125	3125 bps	230 bytes
5	SF7/125	5470 bps	230 bytes
6	SF7/250	11000 bps	230 bytes

US915 Data Rates

DR	Config	Bit Rate	Max Payload
0	SF10/125	980 bps	19 bytes
1	SF9/125	1760 bps	61 bytes
2	SF8/125	3125 bps	133 bytes
3	SF7/125	5470 bps	250 bytes
4	SF8/500	12500 bps	250 bytes

Code Configuration

Setting Region in Firmware

#include "LoRaWan_APP.h"

// Choose your region
LoRaMacRegion_t loraWanRegion = LORAMAC_REGION_EU868;
// Other options:
// LORAMAC_REGION_US915
// LORAMAC_REGION_AU915
// LORAMAC_REGION_AS923
// LORAMAC_REGION_CN470
// LORAMAC_REGION_KR920
// LORAMAC_REGION_IN865

Channel Mask Examples

// EU868 - Default 3 channels
uint16_t userChannelsMask[6] = { 0x00FF, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 };

// US915 FSB1 (channels 0-7)
uint16_t userChannelsMask[6] = { 0x00FF, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 };

// US915 FSB2 (channels 8-15) - TTN default
uint16_t userChannelsMask[6] = { 0xFF00, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 };

// AU915 FSB2
uint16_t userChannelsMask[6] = { 0xFF00, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 };

Range Estimation

Approximate line-of-sight ranges:

Environment	SF7	SF12
Urban	2 km	5 km
Suburban	5 km	10 km
Rural	10 km	15+ km

Tip

Higher spreading factors (SF12) provide better range but lower data rate. Use SF7-SF9 for most applications and reserve SF10-SF12 for challenging environments.