DMR828 2W High Power Wireless Digital Walkie Talkie Interphone Module 400-470 MHZ

Introduction: DMR828 is a 2W long distance all-in-one DMR walkie talkie module. Only need external power supply and speaker, can be used as a small digital walkie-talkie with 16 frequency channels. Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld device Feature: UHF band: 400~470 MHZ Open distance is 8 kilometers High power 2W, low power 0.5W High receiving sensitivity: -124dBm Error rate as low as 1% at -121dBm Transmit receive frequency independent Bandwidth 12.5 / 25 KHz DMR (digital intercom) / analog intercom Support SMS sending function Built-in EEPROM, important data power-down save Stable with 1ppm TCXO crystal 51-level CTCSS analog sub-audio code 166-level CDCSS digital sub-audio 9-level adjustable volume Application: Small professional walkie talkie Invisible intercom system Building community security system Sport products Handheld / Pocketable device Audio surveillance system Parameter Test Conditions MIN. Typical MAX. Unit Operating voltage range 3 4 5 V range of working temperature -20 25 60 Operating frequency range 400 470 MHZ Serial port baud rate 9600 bps Current consumption Sleep current 75 uA Receiving current < 135 mA Emission current (high power) @VCC=5.0V,2W < 1.1 A Emission current (high power) @VCC=4.0V, 1.5W < 950 mA Emission current (low power) @VCC=4.0V,27dBm < 500 mA Transmit power (high power) @VCC=4.0V 1.5 W Transmit power (low power) 500 mW Mike input voltage 0.1 1.6 Vpp Receiving sensitivity -124 dBm Receive error rate (DMR system) @ -121dBm 1 % Audio output power 2 W Audio output impedance 8 Ohm Package includes: 1 x Module 1 x USB cable 1 x Speaker Functions descriptions: DMR828 has default 16 channels, CH0~CH7 in DMR mode, CH8~CHF in analog mode. All the parameters can be configured by serial instructions. Parameter configuration: DMR828 Module offers standard serial port, users can configure and read the related parameters by sending serial instructions. Module has built-in memory, all configured parameters can be saved even power off. Meanwhile, we offer PC software to customers free of charge. DMR828 can be connected with computer via USB cable or UART interface, in this way, users can configure the parameters on PC software or their own device. The connection as shown in the figure below: Pin NO. Pin Name Description 1 VCC Positive supply 2,4 GND Ground 3 CS Leave Open or high level for normal working, pull low to enter sleeping mode 5 PTT Module Input. Transinitting/receiving control, pull low to force the module to enter TX state: pull high for Rx state 6 LINE_OUT Audio output without amplified 7 8 16 Channels. Code 8421. 8th, default output "1" 8 4 16 Channels. Code 8421. 2th, default output "1" 9 2 16 Channels. Code 8421. 2nd, default output "1" 10 1 16 Channels. Code 8421. 1st, default output "1" 11 SPKN Audio output, connect to speaker 8ohm 2W 12 SPKP Audio output, connect to speaker 8ohm 2W 13,15,17,24 GND Ground 14 SET Configuration mode enable (low to enter into tlie setting mode, leave open or connect high leel to exit setting mode) Valid when CS Pin is high or leave open 16 MIC_IN Microphone or line in 18 UART-TX TXD of the module aad connect to external RXD 19 UART-RX RXD of the module and connect to external TXD 20 EZP_CS Reserved 21 SWCLK Reserved 22 SWDIO Reserved 23 ARM_RST Reserved