ATSHA204 emulated signing backend. The emulated ATSHA204
implementation offers pseudo random number generation and
HMAC-SHA256 authentication compatible with a "physical"
ATSHA204.
NOTE: Key is stored in clear text in the Arduino firmware.
Therefore, the use of this back-end could compromise the key
used in the signed message infrastructure if device is lost
and its memory dumped.
The seed for the random number generated is sampled from an
analog pin. The pin is set in MyConfig.h using RANDOMSEED_PIN.
The pin should be unconnected.
The key to use for HMAC calculations must match the key used by
other nodes this node will exchange signed messages with. The key
for ATSHA204 emulator is set in MyConfig.h using hmacKey.
Default SDA pin is A3 for single wire communication.
The pin is selected in MyConfig.h.
I2C variant of ATSHA204 is not supported.
Messages are signed using HMAC-SHA256 where some parts of the
message digest are ATSHA204 specific.
Upgraded RF24 to latest version which supports SoftSPI.
Added DigitalIO and UTFT libraries to support the new example.
Fix problem reported in RelayWithButtonActuator example.
Remove unused libraries.
Add default CS/CE pin to Config.h
Add new variebles for voltage and current.
Add new internal command sent to controller when gateway is ready and online
Serial flush in sleep method also means one less code in examples.
Removed set(bool) in message. Not needed. getBool just calls getInt
__attribute__((packed)) for RPI compability
Print more info in send/read debug prints.
Get internalTemp returns full degrees and uses longer Vref delay
Fix debug print gateway prepend (wrong command/type)
Fixed problem in RelayWithButton example. Now working with ack in both directions.
Serial protocol changed (incoming serial message have an new ack-parameter)
Patrick Fallberg
Henrik Ekblad
Daniel Wiegert