LLCC68-dat
Comparison and Compatibility: SX1262 vs. LLCC68
1. Frequency Support
Both the SX1262 and LLCC68 are sub-GHz RF transceivers that support a continuous frequency range from 150 MHz to 960 MHz. This allows them to operate in all major global ISM bands.
| Region | Common Frequency Band |
|---|---|
| Europe | 433 MHz / 868 MHz |
| North America | 915 MHz |
| China | 470 MHz / 779 MHz |
| Asia / Oceania | 923 MHz |
2. Inter-Chip Communication
The LLCC68 and SX1262 can communicate with each other because they share the same internal architecture and registers. However, you must align their settings:
- Modulation: Both support LoRa® and (G)FSK.
- The SF Constraint: The SX1262 supports SF5–SF12. The LLCC68 is limited to SF7–SF9 (at 125kHz BW).
- Critical Requirement: For successful communication, the SX1262 must be set to a Spreading Factor that the LLCC68 supports (typically SF7, SF8, or SF9).
3. LoRaWAN Protocol Support
Both chips support the LoRaWAN-dat protocol, but their performance profiles differ:
- SX1262: Fully supports all LoRaWAN Data Rates (DR). Ideal for long-range or rural deployments where SF10–SF12 is required.
-
LLCC68: Supports LoRaWAN but is limited to lower Spreading Factors.
- Limitation: It cannot use SF10, SF11, or SF12 at the standard 125kHz bandwidth.
- Recommendation: When using LLCC68 for LoRaWAN, it is best to disable Adaptive Data Rate (ADR) or cap the Data Rate to ensure the network does not request an unsupported SF.
4. Technical Specification Summary
| Feature | SX1262 | LLCC68 |
|---|---|---|
| Frequency Range | 150 – 960 MHz | 150 – 960 MHz |
| Max TX Power | +22 dBm | +22 dBm |
| LoRa® Sensitivity | -148 dBm | -129 dBm |
| Supported SF (125kHz) | SF5 – SF12 | SF7 – SF9 |
| Best Use Case | Long-range, Industrial | Mid-range, Smart Home |
| Interface | SPI | SPI |
Hardware Note: Since both chips use the same SPI command set, firmware written for the SX1262 (such as for an ESP32-S3 setup) is generally compatible with the LLCC68, provided the Spreading Factor limits are respected in the code.