User's Manual

microNode Integration Specification Overview
On-Ramp Wireless, Inc. 2 014-0033-00 Rev. H
1.2 microNode
The microNode is a small form factor wireless network module that easily integrates with
various devices and sensors using an industry standard Serial Peripheral Interface (SPI). There
are two versions of the microNode. The primary difference between the two versions of the
microNode is transmit power. The following table summarizes the differences and
recommendations.
Table 1. microNode Version Comparison
Version Transmit Power Benefits Comments
microNode1
(PN 550-0006-00)
+20.8 dBm (max) This is the first version of the
microNode and is not
recommended for new
designs.
microNode2
(PN 550-0075-00)
+23.3 dBm (max)

More power efficient for
its transmitter functions
 More liberal on its FCC
allowances
This is the second version of
microNode and is the
recommended version for new
designs.
NOTE: This document refers to both microNode1 and microNode2 generically as “microNode.”
Where there are differences, the microNode version is specified (i.e., microNode1 or
microNode2).
The top side of the printed circuit board (PCB) is enclosed with a radio frequency (RF) shield. The
microNode is soldered directly onto a host board via SMT processes. For details, see Appendix B.
Dimensions (per unit): 54.40 mm long by 26.40 mm wide
Weight (per unit): 0.30 oz (8.5 g)
For more details about the microNode, refer to the mechanical drawing in Appendix E. To
order, use the part numbers provided in Table 1.
Figure 2. microNode (Top and Bottom Views)