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E95M-DTU(400SL22-485) Wireless digital radio station LoRa spread spectrum, AT command, serial port online upgrade, 433MHz global unlicensed frequency band, small size rail-mounted radio, transmitting power 20~30dBm


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[Interface type]:RS485/RS232/TTL [Carrier frequency]:410.125~493.125MHz [Transmit power]:22dBm [Communication distance]:5km [Product size]: 80*28*28.5mm [Introduction]:E95M-DTU (400SL22-xxx) is a wireless data transmission radio using military-grade LoRa modulation technology. It has a variety of transmission methods and... Read more

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Categories: DTU/RTUTags: 433mhz

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Processing time: 7 working days

Shipping time: 7-15 working days by China Post Air Mail (may take up to 45 working days due to unpredictable factors such as weather and customs processing).


Please be advised that we do not deliver to

  • Cuba
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  • Democratic People's Republic of Korea (North Korea).
  • Sudan
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  • Venezuela
  • Yemen

We apologize for any inconvenience this may cause.


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We accept order cancellations before the product is shipped. If your order is canceled, you will receive a full refund. We cannot intercept order cancellations if the product has already been shipped.


We accept product returns. Customers have the right to request a return within 30 days of receipt of the product. To be eligible for a return, your item must be unused and in the same condition you received it. It must also be in its original packaging. To complete your return, we require a receipt or proof of purchase.

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Contact our customer service at

Tel: +086 028 61543675

Return address: Building B5, No. 199, West District Avenue, High Tech West District Chengdu, China.


EBYTE product technical manual and detailed parameters download:

[Interface type]:RS485/RS232/TTL

[Carrier frequency]:410.125~493.125MHz

[Transmit power]:22dBm

[Communication distance]:5km

[Product size]: 80*28*28.5mm

[Introduction]:E95M-DTU (400SL22-xxx) is a wireless data transmission radio using military-grade LoRa modulation technology. It has a variety of transmission methods and works in the (410.125MHz~493.125MHz) frequency band (default 433.125MHz). The radio provides transparent RS485/RS232/ TTL interface, adopts plastic shell, rail-mounted structure, supports 8~28V (DC) wide voltage input. LoRa spread spectrum technology will bring longer communication distance and has the advantage of strong anti-interference ability.


General specifications and parameters

No. Item Specifications Description
1 product size 80*28*27 mm See installation size for details
2 Product weight 32 g Weight tolerance of 2g
3 working temperature -40°C 〜+85℃ technical grade
4 voltage range 8〜28V (DC ) 12V or 24V
5 communication interface RS485/RS232/TTL RS485, RS232, TTL three choose one, subject to the physical identification of the product
6 Baud rate Factor}- default: 9600 The Baud rate range is from 1200 to 115200
7 address code Factory default 0 A total of 65,536 address codes can be set

Frequency range and channel number

Model Frequency Transmitting power Reference distance Specification
MHz dBm km
E95M -DTU(400SLxx -XXX ) 433.125M 410.125 〜493.125M 1M 84, Half duplex

★ Note: In the same area, use multiple sets of transmission stations to communicate one to one at the same time. It is suggested that the channel interval be set above 2 MHz.

Transmitting power level

Model 22dBm/30dBm 17dBm/27dBm 13dBm / 24dBm 10dBm/21dBm
E95M -DTU(400SLxx -XXX ) Factory default

★ Note: The lower the transmission power is. the closer the transmission distance is, but the working current will not decrease in the same proportion, so it is recommended to use the maximum transmission power

Air rate rating

Model Default air rate Equal series Air rate grade
bps k bps
E95M -DTU(400SLxx-xxx ) 2.4k 6 2.4、4.8、9.6、19.2、38.4、62.5

★Note: The higher the air speed setting, the faster the transmission rate, and the closer the transmission distance; so if the rate meets the usage requirements, the lower the air speed, the better.

Current parameters

Model Emission current mA Waiting current mA
12V 24V 12V 24V
E95M -DTU(400SL 22-xxx) 45 26 10 7
E95M -DTU(400SL 30-xxx) 250 125 9 5

★ Note: It is recommended to retain more than 50% of the current margin when selecting the power supply,which is conducive to the long-term and stable operation of the radio station.

Length of receiving and receiving and the subcontracting method

ts Cache size Subcontracting method
E95M -DTU(400SLxx -XXX ) 1000 Bytes Can be sent by instruction subcontracting 32 / 64 / 128 / 240 bytes

★  pay attention to:

  1. If the single received data of the radio station is greater than the single package capacity, the excess data will be automatically allocated to the second transmission until the transmission is completed;

  2. Single single received data cannot be greater than the cache capacity


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