Encryption and EBYTE 220 library

[George]

Hi

I was trying to understand how the library’s encryption system works.
In the topic, “Basic configuration option”, it says that it would be possible to configure encryption with “CRYPT Encryption to avoid interception 07H”. (link)

In the E220 module, is there signal encryption (internal to the LLCC68 module) or just the message (Ebyte220 library)?
Do I need to configure any settings to enable message encryption?
Can I change library encryption keys? How?

[Renzo Mischianti]

Hi George,
Sorry for the late response; I’m not at home these days.

E220 has internal encryption managed by two keys, CRIPT_H CRIPT_L; these keys are used for the description. You can change them with configuration.

	configuration.ADDL = 0x03;  // First part of address
	configuration.ADDH = 0x00; // Second part

	configuration.CHAN = 23; // Communication channel

	configuration.SPED.uartBaudRate = UART_BPS_9600; // Serial baud rate
	configuration.SPED.airDataRate = AIR_DATA_RATE_010_24; // Air baud rate
	configuration.SPED.uartParity = MODE_00_8N1; // Parity bit

	configuration.OPTION.subPacketSetting = SPS_200_00; // Packet size
	configuration.OPTION.RSSIAmbientNoise = RSSI_AMBIENT_NOISE_DISABLED; // Need to send special command
	configuration.OPTION.transmissionPower = POWER_22; // Device power

	configuration.TRANSMISSION_MODE.enableRSSI = RSSI_DISABLED; // Enable RSSI info
	configuration.TRANSMISSION_MODE.fixedTransmission = FT_TRANSPARENT_TRANSMISSION; // Enable repeater mode
	configuration.TRANSMISSION_MODE.enableLBT = LBT_DISABLED; // Check interference
	configuration.TRANSMISSION_MODE.WORPeriod = WOR_2000_011; // WOR timing

	configuration.CRYPT.CRYPT_H = 0x00;
	configuration.CRYPT.CRYPT_L = 0x01;

The default values are all 0.

I will try to publish the E220 configuration article next few days with some additional information.

Bye Renzo

[JaTo]

Hello

I am testing all the options and the encryption works correctly by configuring it with your library.

But then I try to check the configuration of a module with the Ebyte specific application (E220_V1.0) and it always shows “Key: 0”.

Could you confirm if your library’s encryption settings work better than the manufacturer’s application?

Regards

[JaTo]

update:

There is a more updated version of the application from the manufacturer E220_V1.1, but it is not well translated into English and does not show the encryption key either…

[JaTo]

Well, auto response after reading the manual again:

The encryption key is write-only. The manufacturer’s application cannot read this parameter.

I apologize for dirtying the forum. I hope it helps if anyone searches for this information.

[Renzo Mischianti]

Thanks for your feedback, JaTo; I often find some bugs in EByte software, and I try to fix Them when I find them.
Bye Renzo

[Author]

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