DeviceGeneric.cpp File Reference

Example-Code for a generic Server (e.g. Sensor, Display) More...

#include <PJON.h>

Macros
#define	ID   45
#define	PJON_INCLUDE_LUDP
#define	BLOCK_SIZE   256

Functions
PJON< LocalUDP >	bus (ID)
void	receiver_function (uint8_t *payload, uint16_t length, const PJON_Packet_Info &packet_info)
void	error_handler (uint8_t code, uint16_t data, void *custom_pointer)
int	main (int argc, char *argv[])

Variables
char	buffer [BLOCK_SIZE]

Detailed Description

Example-Code for a generic Server (e.g. Sensor, Display)

Author

drtrigon

Date

2018-07-31

Version

1.2

• make it more reliable by considering
• network delay/latency LUDP_RESPONSE_TIMEOUT (especially when on battery powered wifi)
• a lot of switches in row (3 for outdoor part of bus)
• possibility of blocked lora channels/freq (increasing delays)
• having (u)sleep in order to reduce cpu load and give os and hardware time
• clean bus from old (hanging) messages

1.1

• use different IDs for linux/ubuntu and raspi builds (use make raspi)
• status and error handling added
• debug output to stderr added
• retrying disabled in favour of the former changes

1.0

• first version derived from OWPJON/LINUX/Local/ThroughSerial/RemoteWorker/DeviceGeneric/DeviceGeneric.cpp

* OneWire PJON Generic "OWPG" scheme:
*   Server e.g. linux machine or raspi
*      OWPJON/LINUX/Local/LocalUDP/RemoteWorker/DeviceGeneric/ (this sketch)
*      OWPJON/LINUX/Local/ThroughSerial/RemoteWorker/DeviceGeneric/
*   Tunnel(er) similar to 1wire master (similar cause we are on a multi-master bus) e.g. AVR
*      OWPJON/ARDUINO/Local/SoftwareBitBang/Tunneler/BlinkingSwitch/
*      OWPJON/ARDUINO/Local/SoftwareBitBang/Tunneler/BlinkingSwitch_SWBB-TL/
*      OWPJON/ARDUINO/Local/SoftwareBitBang/Tunneler/BlinkingSwitch_SWBB-TS/
*      OWPJON/ARDUINO/Local/ThroughSerial/SoftwareBitBangSurrogate/Surrogate/ (obsolete)
*   Devices e.g. AVR
*      OWPJON/ARDUINO/Local/SoftwareBitBang/DeviceGeneric/
*      OWPJON/ARDUINO/Local/SoftwareBitBang/OWP_DG_LCD_Sensors/
*      OWPJON/ARDUINO/Local/SoftwareBitBang/OWP_DG_1w-adaptor/
*      OWPJON/ATTINY/Local/SoftwareBitBang/DeviceGeneric/
*      ...
*
* Reliability and connection issues:
*   It seems that battery powering the notebook (connected via wifi) has heavy influence
*   on UDP packet send delay (and thus PJON health).
*   Increase LUDP_RESPONSE_TIMEOUT to 1000000 (1s) in @ref libraries/PJON/src/strategies/LocalUDP/LocalUDP.h
*   Apply patch: .../sketchbook$ patch -p0 < OWPJON/20180731-udp_latency.patch
*   Also adopting poll timings might help ... for more info in general @ee https://github.com/gioblu/PJON/issues/222
*
* Compatible with: ubuntu 14.04, raspi (look at the Makefile)
*   ID 45: owpshell on linux/ubuntu (testing)
*   ID 46: owpshell on raspi .41 (productive)
*
* Example sending READ_INFO 0x01 to device id 44:
* $ printf "\x01" | ./owpshell - - 44
* owp:dg:v1
* $ printf "\x11" | ./owpshell - - 44 | ../../../ThroughSerial/RemoteWorker/DeviceGeneric/unpack.py f
* 4.771999835968018,
* $ printf "\x12" | ./owpshell - - 44 | ../../../ThroughSerial/RemoteWorker/DeviceGeneric/unpack.py f
* 28.02459144592285,
* More info can be found in @ref OWPJON/README.md.
*
* Thanks to:
* gioblu - PJON 11.0 and support
*          @see https://www.pjon.org/
*          @see https://github.com/gioblu/PJON
* fredilarsen - support
* 

Macro Definition Documentation

#define BLOCK_SIZE   256

#define ID   45

#define PJON_INCLUDE_LUDP

Function Documentation

PJON<LocalUDP> bus

(

ID

)

void error_handler	(	uint8_t	code,
		uint16_t	data,
		void *	custom_pointer
	)

int main	(	int	argc,
		char *	argv[]
	)

void receiver_function	(	uint8_t *	payload,
		uint16_t	length,
		const PJON_Packet_Info &	packet_info
	)

Variable Documentation

char buffer[BLOCK_SIZE]