The Ebyte E01-2G4M27S series features 2.4GHz 27dBm 2.3-3.6V wireless modules based on Nordic nRF24L01P with PA+LNA, offering PCB antenna (2.2km) and ultra-small external antenna (4km) options for industrial IoT.
| Parameter / Model | E01-2G4M27SX | E01-2G4M27S |
|---|---|---|
| RF Chipset | Nordic nRF24L01P + PA + LNA | Nordic nRF24L01P + PA + LNA |
| Operating Frequency | 2.400 - 2.525 GHz | 2.400 - 2.525 GHz |
| Transmitting Power | 27 dBm (approx. 500 mW) | 27 dBm (approx. 500 mW) |
| Communication Distance | 4.0 km (4000 m) | 2.2 km (2200 m) |
| Antenna Structure | External Antenna Interface | Onboard PCB Antenna |
| Dimensions & Weight | 18 x 14.5 mm; 1.0g (+/- 0.1g) | 14 x 23 mm; 1.2g (+/- 0.1g) |
| Supply Voltage | 2.3 V - 3.6 V DC | 2.3 V - 3.6 V DC |
| Interface & Package | SPI; SMD Package | SPI; SMD Package |
| Operating Temperature | -40 to +85 degrees C | -40 to +85 degrees C |
Download Datasheet
e01-2g4m27s Mannual
Demo
PCB
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| Main Parameters | Performance | Remarks | |
| Min. | Max | ||
| Power supply（V） | 2.3 | 3.6 | Voltage over 3.6V will cause permanent damage to module |
| Blocking power（dBm） | - | 10 | Chances of burn is slim when modules are used in short distance |
| Operating temperature（℃） | -40 | +85 | - |
Operating parameter
| Main Parameters | Performance | Remarks | ||
| Min. | Typ. | Max | ||
| Operating voltage（V） | 2.3 | 3.3 | 3.6 | Voltage over 3.6V will cause permanent damage to module |
| Communication level（V） | - | 3.3 | - | For 5V TTL, it may be at risk of burning down |
| Operating temperature（℃） | -40 | - | +85 | Industrial design |
| Operating frequency（GHz） | 2.4 | - | 2.525 | Support ISM band |
| TX Current(mA) | - | 700 | - | Instant power consumption |
| RX current（mA） | - | 23 | - | - |
| Sleep current（μA） | - | - | - | Software is shut down |
| Max Tx power（dBm） | 14 | - | 27 | - |
| Receiving sensitivity（dBm） | - | -99 | - | Air data rate is 250 kbps |
| Air data rate（bps） | 250 k | - | 2M | Controlled via user’s programming |
| Main parameter | Description | Remarks |
| Distance for reference | 2km | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 250kbps |
| FIFO | 32 Byte | Max. Transmitting length per packet |
| Crystal frequency | 16 MHz | - |
| Modulation | GFSK | - |
| Package | SMD | - |
| Communication interface | SPI | 0-10Mbps |
| Size | 14 * 23mm | - |
| Antenna | PCB antenna | 50 ohm impedance |
| Weight(g) | 1.2±0.1 | - |
Practical Application Scenarios
1. Long-Range UAV Flight Control and Telemetry Link
Unmanned aerial vehicles requiring ultra-compact hardware integration benefit from the E01-2G4M27SX. With its ultra-small 18x14.5mm footprint and 1.0g weight, it mounts directly onto flight control PCBs. Utilizing a 27dBm power amplifier and an external high-gain antenna, it delivers high-speed 2.4GHz control signals and telemetry back to ground stations over a 4km range.
2. Autonomous Mobile Robot (AMR) and AGV Warehouse Fleet Logistics
In automated logistics warehouses, AGVs require reliable, low-latency wireless communication without bulky external antennas that could snag during operation. The E01-2G4M27S features an integrated onboard PCB antenna in a 14x23mm SMD form factor. Integrated into Ebyte industrial controllers, it provides low-latency packet transmission over a 2.2km range inside sprawling facility floors.
3. Distributed High-Speed Industrial Equipment Diagnostics
High-speed machinery diagnostics demand rapid data throughput and real-time sampling across industrial plants. Both modules interface with host microcontrollers via high-speed SPI, utilizing the Nordic nRF24L01P RF engine and LNA sensitivity boost to reliably transmit high-bandwidth vibration, temperature, and operational metrics from rotating machinery to central edge gateways.
FAQ Section
1. What are the key differences between E01-2G4M27SX and E01-2G4M27S for hardware selection?
The main differences lie in antenna design, dimensions, and communication distance. The E01-2G4M27SX measures 18x14.5mm and requires an external antenna to achieve up to 4km range, ideal for space-constrained long-range applications. The E01-2G4M27S measures 14x23mm and features a built-in onboard PCB antenna delivering up to 2.2km range, perfect for compact products requiring plug-and-play RF integration without extra antenna assembly.
2. What power supply design guidelines should be followed for 27dBm peak transmission?
Both modules integrate a 500mW (27dBm) power amplifier, causing peak current to draw significantly more power during burst transmission than standard nRF24L01P chips. The DC supply must strictly remain between 2.3V and 3.6V with at least 500mA current capacity. Placing a low-ESR 10uF ceramic capacitor alongside a 100uF capacitor close to the VCC pin is essential to prevent voltage drop and module resets.
3. How does the integrated PA/LNA impact SPI software programming and CE pin timing?
Because the module incorporates hardware PA (Power Amplifier) and LNA (Low Noise Amplifier) switching circuits, proper timing control on the CE pin is necessary. When switching between TX and RX modes, software drivers should include a brief switching delay (typically 10 to 100 microseconds) to allow the hardware amplifier stage to settle before initiating SPI data transfers.
