Pin
Pad
Description
I/O
MODE_1
9
Operation mode pin
Input
BUSY LED_1 LED_2 UTXD URXD /RTS /CTS
10 11 12 13 14 15 16 17 18
Busy pin
Output Output Output Output
RF transmit indication RF receive indication
UART transmit UART receive Request to send
Input
Output
Clear to send
Input Input
WAKE_UP
Wake-up from sleep Negative supply voltage
GND
Supply
Radio protocol selection (Proprietary or Bluetooth Low Energy 5.1)
RPS
B1
Input
B2 B3 B4 B5 B6
B2 B3 B4 B5 B6
Programmable GPIO Programmable GPIO Programmable GPIO Programmable GPIO Programmable GPIO
I/O I/O I/O I/O I/O
Table 1: Shown are the Setebos-I 2.4GHz radio module’s pin designations. LED outputs can be used to indicate radio transmission and reception. Image source: Würth Elektronik
In ideal conditions, with 0 dBm output power, the line-of-site range between the transmitter and the receiver is up to 600m, and the maximum Bluetooth LE throughput is 2Mbits/s. The module features a built-in quarter wavelength (3.13cm) antenna, but it is also possible to boost the range by connecting an external antenna to the aforementioned ANT terminal on the module (Figure 4). The Setebos-I radio module provides access to the nRF52840 SoC’s pins via solder pads. Table 1 lists the function of each module pin. Pins ‘B2’ to ‘B6’ are
programmable GPIOs that are useful for connecting sensors such as temperature, humidity, and air quality devices.
(TELEC) in Japan. Passing the regulations requires submitting a product for testing and certification, which can be time-consuming and expensive. If the RF product fails any part of the test, a completely new submission must be made. If the module is going to be used in Bluetooth mode, it will also need a Bluetooth listing from the Bluetooth Special Interest Group (SIG). Certification for the module doesn’t automatically confer certification onto the end product using the module. But it does typically turn the certification for end products
Short-range wireless product certification
While the 2.4GHz band is a license- free spectrum allocation, radio devices operating in the band are still required to meet local regulations such as those dictated by the US Federal Communications Commission (FCC), European Declaration of Conformity (CE), or Telecom Engineering Centre
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