MODBUS supported now: Empress 2.4GHz Reader (PN:HKRAR-EM02) now supports MODBUS as extended firmware feature

Empress Reader is now supporting MODBUS by acting as agent to respond to Master’s command. All Temperature/humidity wireless sensors (TT02 or HT02) can now act as Slave, reporting to the reader, who then respond to MODBUS’s enquiry (Master). The machine addresses specification will be available in technical document soon.

This is one of the commonly-requested features in environment monitoring and control applications. Modbus is commonly used in PLCs (programmable logic controllers) for industrial applications for many years. 

Please go visit our website for more detail about environmental monitoring.

Keep in mind;
-          Max 100 devices (Slave) is supported
-          This is a requested feature, and not a BUILT-IN feature in ordinary firmware YET. Please specify before placing orders.
-          Firmware upgrade method will be provided, for distributor’s stock items.
-          Readers are serial port, RS232; For RS485 users, a simple converter can be provided.

-          Readers are powered by 5V 2A DC, instead of 12V.


Preview on new features for EM02 latest firmware, BTLE added.

Apart from Empress series transponder such as Hussar/Garrison/Tempcorder series, now Empress EM02 readers can also gather the beacon signal from BTLE devices, especially useful for scanning IDs from wearables such as Fitbit, Jawbone, etc.

Empress EM02 is a FCC CE certified reader, has long been used as data gatherer for telemetry business applications together with Empress series transponders. With the latest upgrade, by simply switching setting by software command, it can read bluetooth device's ID, meaning the reader can now work alone in many other business applications. This reader can be used as gateway for Bluetooth smart devices (BT4.0 or above), which is popular in smartwatch, wearable, health activity recorder, mobile phone apps, etc.

BT4.0 or BTLE USB dongles are common and they can do the same, they are best for small scale development and demo test. However, this EM02 reader provides more options in project implementation, in terms of choice of extendable antenna and network connectivity.

This EM02 is also perfect for projects which requires reading proprietary devices and BTLE devices at the same time (DUAL mode), for example, reading meter readings (proprietary) and staff ID (BTLE) at the same time. See the video for live explanation.

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