The E01C Series consists of high-performance 2.4GHz SPI wireless modules using Si24R1/Ci24R1 chips, offering transmit power from 11dBm up to 27dBm with a maximum range of 5km. These modules are hardware-compatible with nRF24L01+ solutions, providing a cost-effective alternative for industrial-grade data transmission.
| Model | Core Chip | Tx Power | Max Distance | Interface | Antenna |
|---|---|---|---|---|---|
| E01C-2G4M11S | Ci24R1 | 11 dBm | 120 m | SPI | PCB |
| E01C-ML01SP2 | Si24R1 | 20 dBm | 1.8 km | SPI | PCB |
| E01C-ML01DP5 | Si24R1 | 20 dBm | 2.5 km | SPI | SMA-K |
| E01C-2G4M27D | Si24R1 | 27 dBm | 5 km | SPI | SMA-K |
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Application
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Industrial Automation Systems: The E01C-2G4M27D solves the problem of high-interference in factory environments by utilizing 27dBm transmission power and a high-gain PA+LNA structure. It ensures stable, long-distance communication between industrial controllers and actuators across a 5km radius.
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Smart Home & Peripherals: For ultra-small wireless mice, keyboards, or smart lighting, the E01C-2G4M11S provides a 120m range with minimal power consumption. Its compact SMD footprint and Ci24R1 chip offer a high-performance alternative to traditional nRF24L01+ solutions.
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Remote Agricultural Monitoring: In expansive outdoor fields, the E01C-ML01DP5 utilizes 20dBm power to maintain a reliable link between soil sensors and central gateways over 2.5km, effectively penetrating light foliage and managing wide-area data telemetry.
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Wireless Data Loggers: Integrators can leverage the SPI interface and GFSK modulation of the E01C series to build high-speed wireless telemetry systems, achieving up to 2Mbps airspeed for real-time monitoring of industrial vibration and temperature sensors.
FAQ
Q: Can the E01C series modules communicate directly with original nRF24L01+ hardware?
A: Yes, the Si24R1 and Ci24R1 chips are hardware and protocol compatible with nRF24L01+. They share the same GFSK modulation, frequency hopping, and SPI register structures, allowing them to be used in mixed-vendor networks without software modification.
Q: What are the power supply requirements for the E01C-2G4M27D to maintain maximum output power?
A: The high-power 27dBm version requires a stable DC power supply between 2.0V and 3.6V. During transmission, the instantaneous peak current can reach 400mA to 500mA due to the power amplifier. It is mandatory to use a low-dropout regulator and place a 10uF to 100uF tantalum capacitor close to the VCC pin to prevent voltage dips.
Q: How should I handle the logic level translation if my microcontroller operates at 5V?
A: The SPI pins on E01C series modules are 3.3V logic level. While some Si24R1 variants are 5V tolerant on certain pins, it is highly recommended to use a logic level shifter or simple resistor voltage divider on the SCK, MOSI, and CSN lines when connecting to a 5V MCU to avoid permanent damage to the RF chip.
Q: What impact does the characteristic impedance have on the SMA-K antenna port?
A: The module is designed with a 50-ohm characteristic impedance. Using an antenna or a pigtail cable that does not match this impedance will cause high Voltage Standing Wave Ratio and signal reflection back into the PA. This not only reduces the communication distance significantly but can also lead to heat buildup and failure of the power amplifier in 27dBm models.
