The Ebyte E78-868LN22S(6601) is an SMD LoRaWAN node module based on the ASR6601 SoC, operating across 850-925MHz with 21dBm transmit power, -140dBm sensitivity, Class A/C support, OTAA/ABP activation, UART AT command control, and up to 5.6km transmission range for low-power IoT networks.
| Parameter Name | E78-868LN22S(6601) |
|---|---|
| Main IC / Platform | ASR6601CB (SoC with integrated MCU and LoRa Transceiver) |
| Operating Frequency Band | EU 850 MHz to 925 MHz |
| Protocol / LoRaWAN Class | Standard LoRaWAN Protocol / Class A and Class C Nodes |
| Network Activation Mode | OTAA (Over-The-Air Activation) and ABP (Activation By Personalization) |
| Transmit Power (Max) | 21 dBm |
| Receiving Sensitivity | -139 dBm to -140 dBm |
| Reference Distance | 5600 meters (5.6 km clear line of sight, antenna height 2m, air rate 1kbps) |
| Communication Interface | UART (Standard AT Command Configuration) / SPI (0-10Mbps) |
| Power Consumption | TX: 110-130 mA | RX: 13-15 mA | Shutdown: 2.4-2.6 uA |
| Package / Dimensions | SMD Surface Mount / 20 x 14 x 2.8 mm |
| Weight | 1.2g plus or minus 0.1g |
| Antenna Interface / Impedance | IPEX / Stamp Hole Pad (Equivalent 50 ohms) |
| Operating Temperature & Humidity | -40 to +85 degrees Celsius / 10% to 90% RH |
| Main Parameter | Description |
Remark |
| IC |
ASR6601CB |
- |
| Form factor |
20* 14*2.8 mm |
- |
| Weight |
1.2±0.1g |
- |
| Operating temperature |
-40 ~ 85℃ |
- |
| Working temperature |
10% ~ 90% |
- |
| Storage temperature |
-40 ~ 125°C |
- |
|
Emission current（Lora@2.4kbps） |
110~130mA |
- |
|
Receive current（Lora@2.4kbps） |
13~15mA |
- |
| Turn off the current |
2.4~2.6μA |
- |
| Transmit power |
21dBm |
- |
| Receive sensitivity |
-139~-140dBm |
- |
| TCXO crystal |
32MHz |
- |
| TCXO crystal voltage configuration |
1.8~3.3V |
- |
| Recommended operating band |
850~925MHz |
- |
| Reference distance |
5600m |
Clear and open, antenna height 2 meters, air rate 1kbps |
| Crystal frequency |
32MHz |
- |
| Modulation |
LoRa |
GFSK Mode ，FLRC Mode，LoRa Mode |
| Package |
SMD |
- |
| Interface mode |
1.27mm |
- |
| The communication interface |
SPI |
0～10Mbps |
| Antenna interface |
IPEX/stamp hole |
with an equivalent impedance of about 50Ω |
Practical Application Scenarios
1. Smart Utility Metering and Urban Environmental Sensor Networks
In smart city infrastructure, deployment of water, gas, and electricity meters requires long-range, battery-efficient telemetry. System integrators embed the E78-868LN22S(6601) module directly into meter nodes running in LoRaWAN Class A mode. Using OTAA activation, the nodes securely join public or private 868MHz LoRaWAN gateways (such as Ebyte outdoor multi-channel gateways). The module's low shutdown current of 2.4-2.6 uA allows meter nodes to operate on lithium batteries for over 10 years while periodically transmitting billing and leak detection payloads over distances up to 5.6 km.
2. Industrial Security Alarm and Perimeter GPS Tracking Systems
For asset security in logistics parks and industrial facilities, real-time alerting and low latency are critical. Operators configure the E78-868LN22S(6601) module to Class C node mode, enabling continuous downlink reception for immediate control commands. Integrated with Ebyte GNSS positioning sensors, the module transmits geo-coordinate data and tamper alarm signals across 850-925MHz networks. The 21dBm transmit power ensures reliable uplink signal penetration through reinforced concrete walls and metal storage containers.
3. Remote Agricultural Telemetry and Smart Greenhouse Control
Large-scale farming operations rely on distributed soil moisture, temperature, and automated irrigation controls. By utilizing standard UART interfaces and simple AT commands, engineers connect the E78-868LN22S(6601) to field sensor arrays and solenoid valve actuators. Paired with Ebyte Modbus RTU I/O expanders, the setup automatically adjusts irrigation schedules via cloud-connected LoRaWAN servers, maintaining robust wireless links across vast crop fields without requiring expensive cellular data plans.
4. FAQ Section & JSON-LD 结构化代码
FAQ Section
1. How does the ASR6601 SoC architecture in E78-868LN22S(6601) streamline product development compared to traditional MCU plus Semtech transceiver dual-chip solutions?
The E78-868LN22S(6601) utilizes the ASR6601 System-on-Chip (SoC), which integrates a 32-bit ARM Cortex-M4 microcontroller and a high-performance LoRa radio transceiver onto a single silicon die. This single-chip architecture eliminates external SPI wiring constraints and impedance matching losses between the host MCU and RF front-end, reduces PCB footprint down to 20x14mm, and lowers overall bill-of-materials (BOM) cost for OEM volume manufacturing.
2. How do Class A and Class C node modes differ on the E78-868LN22S(6601), and how do I select the right mode via AT commands?
Class A mode is optimized for battery-powered end-devices; the module remains in deep sleep (2.4-2.6 uA) and opens two short receive windows only after transmitting data. Class C mode keeps the receiver continuously active (13-15 mA RX current) except during transmission, enabling zero-latency downlink commands for real-time actuators. Developers can switch between Class A and Class C operational profiles dynamically by sending standard UART AT commands to the module's serial interface.
3. What are the key differences between OTAA and ABP network join modes supported by the E78-868LN22S(6601) module?
Over-The-Air Activation (OTAA) performs a dynamic cryptographic handshake (Join Request / Join Accept) with the LoRaWAN network server using DevEUI, AppEUI, and AppKey, establishing session keys dynamically for maximum security. Activation By Personalization (ABP) hardcodes DevAddr, NskSKey, and AppSKey into the module's non-volatile memory, allowing instant network connectivity without join delay. OTAA is strongly recommended for commercial deployments, while ABP is ideal for isolated, fixed-topology private testing.
