User Manual

General
Frequency ISM 2.4 GHz
Spreading Method Direct Sequence (DSSS)
Modulation O-QPSK
Dimensions 33.86mm x 33.86mm
Operating Temperature - 40 to 85 deg C.
Antenna Options U.FL and RP-SMA
Weight 9 grams
Networking
Topology SNAP
Error Handling Retries and acknowledgement
Number of Channels
15 channels. To avoid exceeding FCClimits, channel 15 operates in
a receive only state.
Available I/O
UARTS with optional HW
Flow Control
2 Ports
GPIO 20 total; 7 can be analog-in with 10bit ADC
Agency
Approvals
FCC Part 15.247 U9O-RF220SU
Industry Canada (IC) 7084A-RF220SU
RF220SU Module Pin Definitions
For pin locations, consult RF220SUMechanical Drawing on page 7. later in this document.
RF220SU
Pin
Pin Name
SNAPpy
IO
ATmega128RFA1 Pin
Name
Pin Description
1 GND GND Power Supply
2 GPIO0 7 PB7_OC0A_OC1C_PCINT7 IO or PWM or Interrupt
3 GPIO1 6 PB6_OC1B_PCINT6 IO or PWM or Interrupt
4 GPIO2 5 PB5_OC1A_PCINT5 IO or PWM or Interrupt
Table 2: RF220SU Pin Assignments