User's Manual
Table Of Contents
- Introduction
- Safety Information
- Operation
- Configuration
- Protocols
- Serial Point to Point Operation
- Input Handling
- Output Handling
- WTE Output Control Protocol
- Store Forward Operation
- Installation
- MReX Firmware Upgrade
- Antenna
- Disclaimer
- Manufacturing marking and labels
- Maintenance
- Product End Of Life
- Product Warranty
- Specification
MReX Transceiver User Manual v1.92 Firmware
Input Handling
Note: Please refer to Input Output Hardware Connection section on this manual for ex-
amples of how to connect the input and output pins on the MReX board.
The MReX supports 5 programmable inputs. Each input can be programmed with a short message
up to 50 characters in length. Input messages must always be formatted as WT Protocol.
By default IO pins are all configured as inputs. The output function is determined by the
*OUT_CONFIG command. See “Output Handling”.
On start-up each input is read. Only inputs that change from the start-up input state are processed.
Commands relating to input handling:
*IN_CONFIG_H specifies all input transition to high level configuration parameters.
*IN_CONFIG_L specifies all input transition to low level configuration parameters.
*IN_MSG_H specifies the high level message that will be transmitted if configured.
*IN_MSG_L specifies the low level message that will be transmitted if configured.
The *IN_CONFIG_H and *IN_CONFIG_L commands allow the input to specify:
• How many messages are transmitted once triggered.
• The debounce period (how long the input must be in a new state continuously in order to
transmit) before the input is triggered.
• How long to wait until the message is retransmitted.
The *IN_MSG_H and *IN_MSG_L commands allow the input to specify the message which will
be transmitted when the input is triggered.
Full example:
In this example both inputs are configured to transmit only when moving from high to low (no high
level transmissions). Transmit 5 times, 10 seconds between each transmission. Debounce period is
to be configured to 2 seconds (input must have transitioned from a stable low level to constant high
level for two whole seconds).
The protocol being used is WT protocol, and the message for each input message is “IN 1 LOW”
and “IN 2 LOW”. Message is to be transmitted as POCSAG alphanumeric to cap code 1234560,
beep level 1 and 512 baud.
© WTE Limited, 2020 – Christchurch New Zealand Page 31 of 59