Introduction
The JX-660T series is a low cost, ultra-low power, high performance two way semi-duplex LoRa modulation transceiver with operation at 433MHz, 868MHz and 915MHz. It integrates with 32 bit high speed low-powered MCU and high performance ASR6601. ASR6601 is a combo consisted of RF chip SX1262 and Arm Cortex M4 core MCU. Adopting high efficiency forward error correction with interleaving encoding (FEC) technology, it makes anti-interference ability and reception sensitivity greatly improved. That guarantees good performance in the harsh environment such as some industrial application. The FEC technology is advanced and unique in radio data communication field.
The JX-660T has the UART interface, that make it is easy to implement wireless data transmission. It is flexible for users to set the baud rate, frequency, output power, air data rate etc parameters. The compact size makes it an ideal option for radio data communication application.
Version Update (2025/09/24 Update)
The LoRa Radio Module has been upgraded for enhanced performance and efficiency. The previous version (V1,SX127x-based) is now succeeded by the current JX-660T (V2, SX1262-based).
Core Functionality: The module continues to utilize LoRa™ spread spectrum modulation for long-range, low-data-rate wireless communication. It maintains a TTL serial (UART) interface for configuration and data transfer and supports star network topology (using a proprietary protocol). Similar to V1, the JX-660T (V2) is not LoRaWAN™ compatible.
Key Upgrades & Parameter Changes (JX-660T V2 vs. V1)
Core Chip: Upgraded to Semtech SX1262. (Previously V1: SX127x series)
Transmit Power: Increased to 22dBm. (Previously V1: 20dBm)
Receiver Sensitivity: -135dBm. (Note: Some V1 models like YL-800T featured -148dBm)
Sleep Current: Reduced to ＜2.0µA. (Previously V1: ≤3.9µA)
RX Current: Reduced to ＜12mA. (Previously V1: ≤15.2mA)
Wake-up Method: Instant wakeup (PA3 pin active low). (Previously V1: EN pin pull-low, typically 50ms required in Node mode)
Max UART Baud Rate: Extended to 115200bps. (Previously V1: Up to 57600bps for YL-800T)
Max Packet Size: Increased to 1KB (Normal mode). (Previously V1: 200 bytes for YL-800T)
Operating Temperature: Range extended to -40~+85℃ (Industrial). (Previously V1: -40~+80℃ for YL-800T)
New V2 Special Features: Includes CAD Collision Avoidance, Power-saving passthrough, and HEX addressing.
Specification
Operating Voltage: 2.1V ~ 5.5V
Working Frequency Band: 380-450MHz
Modulation: LoRa™ Spread Spectrum
Transmit Power: 22dBm (150mW, 7-level adjustable)
Receiver Sensitivity: -138dBm
TX Current: ＜125mA (@22dBm)
RX Current: ＜12mA
Sleep Current: ＜2.0µA
Spreading Factor: 5-32 / 6-64 / 7-128 / 8-256 / 9-512 / 10-1024 / 11-2048 / 12-4096
Signal Bandwidth: 125KHz / 250KHz / 500KHz
Wakeup Method: Instant wakeup (PA3 pin active low)
Networking Mode: Central / Node / Passthrough; Star topology
Special Features: CAD Collision Avoidance, Power-saving passthrough, HEX addressing
Sleep Time Range: 0.25S ~ 25S
Wake Time Range: 2ms ~ 64ms
Communication Interface: TTL Serial Communication (UART)
UART Baud Rate: 1200bps ~ 115200bps (Default: 9600bps)
UART Parity: 8E1 / 8O1 / 8N1 (Default: 8N1)
Low-Power UART Rate: 9600bps
Operating Temperature: -40℃ ~ +85℃ (Industrial)
Max Packet Size: 1KB (Normal mode)
Antenna Interface: RF pin (50Ω impedance)
Shipping List
LoRa Radio Module - 868MHz (JX-660T V2) x2
868MHz antenna (2m SMA-Male connector) x2
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