HM-TRP Series 100mW Transceiver modules V1.0

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Tel: +86-755-82973805

Fax: +86-755-82973550

E-mail: sales@hoperf.com

http://www.hoperf.com

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7. LED function

The HM-TRP add the LED function for easier debug & function demo, thus the users can easily understand

whether the module is working or not or in any other status.

LED function:

1. The red and green LED will flash when there is power on if the module start working.

2. The module will be ready for Config status if ENABLE pin is low，CONFIG pin is low. It will be in

Config if the red and green LED keep lighting. The green and red LED will not keep lighting if the

module is not in Config mode.

3. The red LED flash when the module is in transmission ，the red LED will be off if the transmission

finished.

4. The green LED is off when the module is in receiving status, the green led will flash once if the module

receive data.

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8. Config Instruction

You need to Config the parameter and inquiry for different need to realize the function. The HM-TRP can

Config and inquiry for working frequency, wireless data rate , receiving ISM bandwidth, frequency

deviation, transmission power, UART transfer baud rate & RSSI signal reading etc.

Config and Inquiry methods:

The module will be ready for Config status if ENABLE pin is low，CONFIG pin is low. It will be in Config

if the red and green LED keep lighting. Then you can Config & inquiry on the module.

The Config instruction format is as AA FA+[instruction]+[parameter].The instruction is 1 byte，the

parameter is the HEX data of 0-4 byte which the high byte before the low byte.

The instruction’s transfer speed should keeps the same as the transfer speed of UART. The instruction’s

transfer speed will change accordingly if changes the transfer speed of UART .The range of transfer speed

of

the instruction is from 1.2Kbps –115.2K bps.

Config& Inquiry instruction description:

1. Instruction[F0]:

Reset to default parameter, no parameter follows

Config instruction：AA FA F0

2. Instruction[E1]:

Reading the current Config parameter, no parameter follows

Config instruction：AA FA E1

3. Instruction [D2]:

Set up working frequency，[parameter]4 byte，[parameter] Unit :Hz

Set up range:

HM-TRP-433: 414000000-454000000Hz

HM-TRP-470: 450000000-490000000Hz

HM-TRP-868: 849000000-889000000Hz