Copyright ©2012–2017,Chengdu Ebyte Electronic Technology Co., Ltd. 1Version Date Description Issued by1.00 2017/12/06 Initial version huaa1.10 2017/12/06 Name changed huaa1.20 2018/05/23 Content added Huaa1.30 2018/08/01 E73(2G4M08S1C) added HuaaBrief IntroductionE73 series are wireless Bluetooth modules designed by Chengdu Ebyte which feature small size, low power consumption, built in PCBantenna and IPX interface. E73 series adopt the originally imported RFIC nRF52832/ nRF52810/nRF52840 of NORDIC, supporting BLE 4.2and BLE 5.0. The chip has high-performance ARM CORTEX-M4F kernel and other peripheral resources, such as UART, I2C, SPI, ADC, DMA,PWM etc. The module led out all the IO port of nRF52832/nRF52810 and most IO Port of nRF52840 for multilateral development. For moredetails, please refer to the datasheet of NORDIC. For E73 (2G4M04S1D), We used 16MHz high precision low temperature drift activecrystal oscillator and other model used 32MHz crystal oscillator, which ensure its industrial characteristics and stability performanceCompared with Bluetooth 4.2, Bluetooth 5 has the following advantages: 2x air data bandwidth(2Mbps), The broadcasting capacity isincreased(x8). Broadcasting extension makes the data length increase to 251 bytes which enables more effective data transmission inbeacon applications. 5210 applies S112 protocol stack which has been strictly tested and upgraded. It supports 196kB Flash/24kB RAM ofnRF52810 SoCs. S112 protocol stack only take 100kbB flash which means it saves enough space for massive low consumption Bluetoothapplications and provides reliable support for upgrade for OTA applications.E73 series are hardware platform without firmware, so users need to conduct a secondary development. This series have maximizedthe RF characteristics of chip. The built-in 32.768K real-time clock crystal oscillator can benefit users in programming(Note:E73(2G4M08S1C) did not built in the crystal oscillator.)Model Frequency Transmitting power Distance(PCB/IPX) Packing AntennaE73 (2G4M04S1B) 2.4GHz 4dBm 100m SMD PCB/IPXE73 (2G4M04S1A) 2.4GHz 4dBm 110m SMD PCB/IPXE73 (2G4M04S1D) 2.4GHz 4dBm 110m SMD PCB/IPXE73(2G4M08S1C) 2.4GHz 8dBm 120m SMD Ceramic antenna