The Ebyte E840-TTL(EC05-DNE) is a compact 25x25mm 4G LTE Cat 1 cellular module operating over a wide DC 4.5-18V range, featuring a 2.0mm TTL serial pin interface that enables dual-link MQTT data transparent transmission and direct cloud platform integration across the Asia-Pacific region, Australia, and New Zealand.
| Parameter Type | Technical Specifications |
|---|---|
| Product Model | E840-TTL(EC05-DNE) |
| Cellular Technology | 4G LTE Cat 1 |
| Working Voltage | DC 4.5 to 18V |
| Data Interface | TTL Level (2.0mm pin header) |
| Product Size | 25 x 25 mm |
| Product Weight | 4.1 to 4.5 g |
| Network Features | Supports 2 Socket links, Two-way transparent transmission |
| IoT Protocols | MQTT protocol |
| Cloud Access Platforms | Alibaba Cloud, OneNet, Baidu Cloud, Huawei Cloud |
| Target Target Regions | Asia-Pacific, Australia, New Zealand, etc. |
| Parameter name | Parameter value | Description |
| Characteristic parameters | Support frequency band | LTE-FDD: B1/B3/B5/B7/B8/B20/B28 |
| Network protocol characteristics | Support TCP/UDP/MQTT/HTTP/DNS protocols | |
| RF interface | Generation 1 IPEX interface | |
| Hardware features | Data interface | 3.3V TTL level |
| baud rate | 1200-230400, default 115200bps | |
| data bits | 8 | |
| Stop bit | 1 (default), 2 | |
| Check Digit | None (default), Odd, Even | |
| Operating Voltage | VCC1: DC 4.5~18V | |
| VCC2: 3.3~4.3V | ||
| Note: VCC1 cannot be powered at the same time as VCC2, it is recommended to use the VCC1 pin | ||
| Working current | Peak-VCC1 pin: 2000mA@5V/1000mA@12V | |
| Peak-VCC2 pin: 2500mA@3.3V/2300mA@4.2V | ||
| Standby-VCC1 pin: 50mA@5V/30mA@12V | ||
| Standby-VCC2 pin 80mA@3.3V/60mA@4.2V | ||
| Operating temperature | -40~+85℃ | |
| Dimensions | 25×25mm | |
| product weight | 4.3±0.2g | |
| indicator light | PWR (blue) | Lights up when power is on |
| DATA (green) | Off: The module is powered on and searching for SIM cards; | |
| Flashing: The module detects the correct SIM card and is attaching to the network; | ||
| Steady on: The module is successfully attached to the network; | ||
| DATA (green) | Flashing: When the serial port is sending/receiving data | |
| LINK (orange) | Steady on: The module is successfully connected to the server; | |
| Off: The module failed to connect to the server successfully; |
Real Developer Implementation Case
1. Aerospace Telemetry and Upper-Air Meteorological Monitoring
Project Background: AERD Reusable Rocket and Akashbani V3 Upper-Air Meteorological Balloon, Bangladesh
Core Hardware: E22-400T33E (LoRa) and E840-TTL(EC05-DNE) (4G CAT1)
Technical Challenges:
The high-altitude sounding and rocket launch environment requires the wireless communication module to have extremely strong resistance to mechanical vibration, wide voltage adaptability, and ultra-long-distance signal penetration to prevent telemetry data loss under extreme weather conditions.
Solution Implementation and Performance:
Weather Balloon Environmental Monitoring (4G Cellular Link): The system uses the E840-TTL (EC05-DNE) 4G CAT1 module deployed on an upper-air weather balloon. Its ultra-small size (25x25mm, weight 4.3g) significantly reduces the payload of airborne equipment, and its DC 4.5-18V wide voltage input perfectly adapts to the power supply fluctuations of high-altitude batteries. Through the built-in MQTT protocol, this module enables direct transmission of meteorological data such as temperature and humidity to the cloud platform.
Core Engineering Advantages:
Industrial-grade wide-temperature operation capability (-40~+85℃), standardized TTL serial communication, and plug-and-play architecture significantly lower the R&D threshold for the underlying hardware of aerospace engineering and significantly shorten the project iteration cycle.
Reference link:
1. https://www.facebook.com/photo?fbid=618342430947867&set=a.137723432343105
2. https://www.facebook.com/photo/?fbid=602518355863608
3. https://ebyteiot.com/blogs/ebyte-iot-blog/sponsorship-of-rocket-and-space-program-for-local-bangladeshi-students
FAQ Section
1. What regional cellular operators and networks does the E840-TTL(EC05-DNE) support?
The module is specifically designed and optimized for deployment within the Asia-Pacific region, Australia, and New Zealand. It utilizes 4G LTE Cat 1 technology, allowing field devices to communicate natively over regional carrier LTE infrastructures with optimized data throughput and significantly lower network latency compared to legacy cellular generations.
2. Can this 4G Cat 1 module connect to multiple network servers concurrently?
Yes, the module features advanced dual-link network capabilities, allowing it to establish and manage 2 independent socket links simultaneously. This allows embedded systems engineers to send primary telemetry data to a central management server while concurrently executing background processes like diagnostics or backup log collection over a secondary link via the MQTT protocol.
3. How does the hardware interface and wide voltage range benefit embedded engineers?
The module offers a wide working voltage range from DC 4.5 to 18V, protecting the system against common industrial voltage fluctuations and simplifying the hardware power circuit design. Additionally, it features a 2.0mm pin header with a TTL level serial data interface, enabling engineers to perform rapid hardware debugging and streamline the overall physical integration into existing IoT control boards.