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.
