Ebyte E32-868T20D User Manual

Also see for E32-400T20S: User manual User manual User manual Manual User manual

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Ebyte E32-868T20D User Manual Manual pdf 16 page image

Chengdu Ebyte Electronic Technology Co,;Ltd E32-868T20D user manualCopyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd. 150 1 1 1000ms preamble code of the corresponding timecontinuously. When the receiver works in mode 2, the timemeans the monitor interval time (wirelesswake-up). Only the data from transmitter thatworks in mode 1 can be received.1 0 0 1250ms1 0 1 1500ms1 1 0 1750ms1 1 1 2000ms2 FEC switch  After turn off FEC, the actual data transmissionrate increases while anti-interference abilitydecreases. Also the transmission distance isrelatively short. Both communication parties must keep on thesame pages about turn-on or turn-off FEC.0 Turn off FEC1 Turn on FEC (default)1 0 Transmission power (approximation) The external power must make sure the ability ofcurrent output more than 1A and ensure the powersupply ripple within 100mV.Low power transmission is not recommended due toits low power supply efficiency.0 0 30dBm (default)0 1 27dBm1 0 24dBm1 1 21dBmFor example: The meaning of No.3 "SPED" byte:The binary bit of the byte 7 6 5 4 3 2 1 0Configures by user 0 0 0 1 1 0 1 0Meaning UART parity bit 8N1 UART baud rate is 9600 Air data rate is 2.4kCorresponding hexadecimal 1 A8. Hardware design It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible, andthe module needs to be reliably grounded.； Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverseconnection may cause permanent damage to the module； Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds themaximum value the module will be permanently damaged； Please check the stability of the power supply, the voltage can not be fluctuated frequently； When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of themargin, so the whole machine is beneficial for long-term stable operation.； The module should be as far away as possible from the power supply, transformers, high-frequency wiring and otherparts with large electromagnetic interference.； High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under themodule. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer, and thecopper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital part ofthe module and routed in the Bottom Layer；