Data Sheet
Table Of Contents
- 1 Overview and Key Features
- 1.2 Application Areas
- Features and Benefits
- 2 Specifications
- 3 Hardware Specifications
- 3.1 Block Diagram and Pin-out
- 3.2 Pin Definitions
- 3.3 Electrical Specifications
- 4 Functional Description
- 4.1 Power Management (includes brown-out and power on reset)
- 4.2 Clocks and Timers
- 4.3 RF
- 4.4 UART Interface
- 4.5 SPI Bus
- 4.6 I2C Interface
- 4.7 General Purpose I/O, ADC and PWM/FREQ
- 4.8 nRESET Pin
- 4.9 nAutoRUN Pin
- 4.10 RM1xx VSP Service and Modes
- 4.11 Two-Wire SWD Programming/Debug Interface
- 4.12 RM1xx on-board chip antenna characteristics
- 5 Hardware Integration Suggestions
- 6 Mechanical Details
- 7 Application Note for Surface Mount Modules
- 8 FCC and IC Regulatory Statements
- 9 CE Regulatory
- 10 EU Declarations of Conformity
- 11 Ordering Information
- 12 Bluetooth SIG Qualification
RM1xx LoRa/BLE Modules
Datasheet
https://connectivity.lairdtech.com/wireless-
modules/lorawan-solutions
15
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RM186 RM191
1.8 19.4 11.8 6.5 24.5 14.4 8.5
3.3.4.1 Typical LoRa Current Waveforms for Tx/Rx Cycle
The plots below (Figure 3 and Figure 4) depict a typical Transmit/Receive cycle when sending a LoRa packet to the gateway.
The plots were made using a shunt current monitor and the voltage levels have been translated to currents. The current
plots show a transmitted packet, the first receive window (one second later), followed by the second receive window (one
second following the first receive window). The currents represented are the total module current (the sum of VCC_BLE and
VCC_LORA pins).
Figure 3: Typical RM186 LoRa transmit/receive cycle (full Tx power, Vcc=3.3V, @25°C
Figure 4: Typical LoRa transmit/receive cycle (full Tx power, Vcc=3.3V, @25˚C)
3.3.5 LoRa Receive Sensitivity vs Data Rate
Table 9 tabulates typical LoRa receive sensitivity as a function of the LoRa data rate. The data rate is determined by the
combination of bandwidth and spreading factor of the incoming LoRa signal. The data rates in the table are the LoRaWAN
data rates used by the gateway when transmitting to the end device.