User Guide

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1
Description
The HumPRO
TM
Series is a frequency hopping
spread spectrum (FHSS) transceiver designed
for the reliable transfer of digital data. It has a
very fast lock time so that it can quickly wake
up, send data and go back to sleep, saving
power in battery-powered applications. The
module is available in the 915MHz frequency
band.
The module has several features that increase the data transfer reliability. It
ensures that no other modules are transmitting before it begins transmitting
data. Automatic acknowledgements ensure that the remote side received
valid data. Multiple hopping patterns enable several systems to operate
in proximity without interference. A standard UART interface is used for
module configuration and data transfer. A few simple serial commands are
all that are needed for configuration.
All modules have a unique 32-bit serial number that can be used as an
address. Source and destination addressing support point-to-point and
broadcast links. Address masking by the receiving module allows for
creating subnets. Other network topologies can also be implemented.
Housed in a tiny compact reflow-compatible SMD package, the transceiver
requires no external RF components except an antenna, which greatly
simplifies integration and lowers assembly costs. Versions are available that
have obtained FCC and Industry Canada modular certification.
Features
• FHSS Algorithm
• Fast Lock (<30ms at 115kbps)
• Low power modes
• FCC and IC Pre-certified version
• Simple UART interface
• No external RF components
required
• No production tuning required
• Tiny PLCC-32 footprint
HumPRO
TM
Series 900MHz
RF Transceiver Module
Data Guide
Figure 1: Package Dimensions
Revised 8/15/2019
0.45"
(11.43)
0.55"
(13.97)
0.07"
(1.78)
38 Using the MODE_IND Line
39 Using the PB Line
40 Restore Factory Defaults
40 Using the Low Power Features
42 The Command Data Interface
43 Reading from Registers
44 Writing to Registers
45 Command Length Optimization
45 Example Code for Encoding Read/Write Commands
48 The Command Data Interface Command Set
95 Typical Applications
96 Usage Guidelines for FCC Compliance
96 Additional Testing Requirements
97 Information to the user
98 Product Labeling
98 FCC RF Exposure Statement
98 Antenna Selection
100 Castellation Version Reference Design
102 Power Supply Requirements
102 Antenna Considerations
103 Interference Considerations
104 Pad Layout
105 Microstrip Details
106 Board Layout Guidelines
107 Helpful Application Notes from Linx
108 Production Guidelines
108 Hand Assembly
108 Automated Assembly
110 General Antenna Rules
112 Common Antenna Styles
114 Regulatory Considerations