The Ebyte E04-400M16S is a high-performance ultra-low power wireless transceiver module. It is an ultra-small size patch-type wireless transceiver and transceiver module independently developed based on the S2-LPQTR chip of STMicroelectronics. It works in the 433M/470M frequency band and has a maximum transmit power of 16dBm. Since this module is SPI pure hardware.
[RF chip]：S2-LP
[Working frequency band]：413~479MHz
[Maximum transmit power]：16dBm
[Communication distance]： 1000m
[Product size]： 20*14mm
[weight]：1.2g
|
Main parameters |
description |
Remark |
|
reference distance |
1000m |
Sunny and open environment, antenna gain 5dBi, antenna height 2.5 meters |
|
Crystal frequency |
26 MHz |
- |
|
Modulation |
SIGFOX |
2(G)FSK, 4(G)FSK, OOK, ASK |
|
Packaging method |
SMD type |
- |
|
Interface mode |
1.27mm |
stamp hole |
|
Communication Interface |
SPI |
0～10Mbps |
|
Dimensions |
20*14mm |
- |
|
RF interface |
Stamp hole/IPEX |
Equivalent impedance is about 50Ω |
| Main parameters | Minimum value | Typical value | Maximum value | Unit | Remark |
| voltage | 2.5 | - | 3.6 | V | Exceeding the maximum value may permanently burn the |
| blocking power | - | - | 10 | dBm | Less likely to be burned if used at close range |
| Operating temperature | -40 | - | 85 | ℃ | Industrial grade design |
| Operating Voltage | 2.5 | 3.3 | 3.6 | V | ≥3.3V guarantees output power |
| Communication level | - | 3.3 | - | V | There is a risk of burning when using 5V level |
| Working frequency | 413 | 433 | 479 | MHz | Support ISM band |
| Emission current | - | 10 | - | mA | Instantaneous power consumption@10dBm |
| receive current | - | 7 | - | mA | - |
| Sleep current | - | 2.5 | - | nA | Software shutdown |
| Maximum transmit power | 13 | 14 | 16 | dBm | - |
| Receive sensitivity | -100 | -120 | -130 | dBm | 0.3 kbps over the air |
Practical Application Scenarios
1. Battery-Powered IoT Sensor Nodes
The E04-400M16S is engineered for extreme power efficiency, making it the perfect choice for field sensors in agriculture or environmental monitoring. When paired with a low-power MCU, it allows battery-operated devices to remain in sleep mode for extended periods while reliably transmitting periodic status updates over long distances.
2. Compact Industrial Remote Controls
Due to its ultra-small 20x14mm form factor, this module is highly effective for integration into handheld remote controllers for industrial machinery. Its robust hardware SPI interface provides the stable, low-latency communication required for real-time control applications, replacing bulky legacy radio solutions.
3. Smart Metering and Sub-GHz Data Aggregation
This module excels in high-density smart metering applications where small size and low power are critical. It can be integrated into residential utility meters to reliably report consumption data to a central gateway, utilizing the Sub-GHz frequency band to penetrate obstacles better than 2.4GHz signals.
FAQ Section
1. Can the E04-400M16S be used directly with an Arduino without a library?
Since this module is a pure hardware SPI device, you will need to implement the SPI driver and the register configuration for the S2-LP chip within your code. While no specific Ebyte-provided library is required to operate the hardware, refer to the STMicroelectronics S2-LP datasheet for register-level commands.
2. Is this module compatible with LoRa modulation?
No, the E04-400M16S uses the S2-LP chip, which supports 2(G)FSK, 4(G)FSK, OOK, and ASK modulation schemes. It is designed for applications where high-performance sub-GHz FSK/ASK communication is preferred over LoRa spread spectrum.
3. Does the module require an external antenna?
Yes, an appropriate 433MHz or 470MHz antenna must be connected to the RF pad to achieve the rated 1000m communication distance. Using the module without an antenna or with an incorrectly matched antenna can degrade performance and potentially damage the output stage.
