AS32-TTL-100 is a 100 mW industrial-grade wireless data transmission module with high stability working on 433MHz frequency. The module uses an SX1278 main chip, LoRa spread spectrum transmission, and TTL level output, and it is compatible with 3.3V and 5V IO port voltage. LORA spread sptrum makes the module have a longer communication distance. AS32 operating frequency is 410MHz to 441MHz with a total of 32 channels.

Key Features

Interface: UART
Power: 20 dBm(100 mW)
Frequency: 433 MHz (410~441MHz)
RF connector: SMA
Distance: 3000 m

Specifications

No.	Parameter Name	Parameter Values Details
1	Module Size	23 X 43mm (not including antenna or SMA junction)
2	Source of the Devices	All imported components from Japan, USA, Germany
3	Production Craft	Lead-free, electrostatic bag packaging
4	Interface Mode	1 X 7 X 2.54 mm, plug-in packaging, compatible with universal boards and DuPont lines
5	Operating Frequency	410 to 441MHz, adjustable in 1MHz steps, factory default: 433.0MHz
6	Supply Voltage	2.5V-5.5VDC meets various system requirements (transmission power decreases if the voltage is below 3.6V)
7	Communication Level	Maximum 5.2V, recommended voltage should be less than 0.3V below supply voltage to reduce power consumption
8	Measured Distance (3.0VDC)	About 3000m under test conditions: sunny, open, maximum power, 5dBi antenna, 2m height, 2.4K air rate
9	Transmission Power	Maximum 20dBm (about 100mW), adjustable in 4 levels (0-3), approximately 3dBm difference between each level
10	Air Rate	6 levels adjustable (0.3, 1.2, 2.4, 4.8, 9.6, 19.2Kbps)
11	Sleep Current	1.5uA (MD1 =1, MD0 = 1)
12	Transmitting Current	110mA@100mW (at 5V)
13	Receiving Current	18mA (Mode 0, Mode 1), minimum about 30uA (Mode 2 + 2s wake-up)
14	Communication Interface	UART serial port, 8N1, 8E1, 8O1, baud rates from 1200 to 115200, a total of 8 options
15	Driving Means	UART serial port, settable to push-pull, pull-up, or open-drain
16	Transmitting Length	Internal FIFO cache of 256 bytes, automatic packet segmentation, supports infinite-length packets under some setups
17	Receiving Length	Internal FIFO cache of 256 bytes, automatic packet segmentation, supports infinite-length packets under some setups
18	Module Address	65536 configurable addresses, supports networking, broadcast, and fixed transmission modes
19	RSSI Support	Built-in intelligent processing
20	Receiving Sensitivity	-130dBm at 2.4Kbps (independent of serial port baud rate and delay time)
21	Antenna Type	SMA antenna / Spring antenna
22	Operating Temperature	-40℃ to +85℃
23	Operating Humidity	10%-90% relative humidity, non-condensing
24	Storage Temperature	-40℃ to +125℃

Pin Definition

Pin No.	Name	Pin direction	Pin application
1	MD0	Input (very weak pull-up)	Cooperates with MD1 to decide 4 kinds of work modes, which cannot be floated
2	MD1	Input (very weak pull up)	Cooperates with MD0 to decide 4 kinds of work modes, cannot be floated
3	RXD	Input	TTL UART inputs, connected to the external TXD output pin. It can be configured as open-drain or pull-up input, see parameter setting
4	TXD	Output	TTL UART outputs, connected to the external RXD input pin. It can be configured as open-drain or pull-up output, see parameter setting
5	AUX	Output	Used to indicate the working status of the module, the user wakes up the external MCU, during the initial power-on self-test period, it outputs low and can be configured as an open-drain output, or push-pull output, see parameter settings.
6	VCC		Power input, power supply 2.5-5.5V (Note: if it is less than 4.5V the output power will decline, but the impact on the reception performance is very small.)
7	GND		Ground line, connected to the power supply reference ground.

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