💬 Building a wired RS485 sensor network

[rejoe2]

@Pavel-Polititsky
To me this looks like you mixed between-node communication (RS485) with debug output (and maybe also serial output of the gw).
The corresponding serial interface for RS485 should be dedicated to RS485 exclusively.

[PepoV6]

Hi,
first of I have to thank you for your effort on this project! It helped me a lot.
In my house I would like to build 2 networks, one with serial gateway with RF24 for ground floor and outside. Second will be in cellar and I was thinking about Ethernet gateway (W5500) but sensors will be connected via RS485. Do you have code for that? On the video it looks like that in the box on right side it is something like this.

[GieBek]

I have exactly the same problem. Has anyone managed to run it.

[GieBek]

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| |/| | | | _ \ / _ \ _ \/ __|/ _ \| _/ __|
| | | | || || | / | | _ \ _ | | _
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|__/ 2.3.1

16 MCO:BGN:INIT NODE,CP=RSNNA---,REL=255,VER=2.3.1
26 TSM:INIT
27 TSF:WUR:MS=0
28 TSM:INIT:TSP OK
30 TSM:FPAR
56 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
2063 !TSM:FPAR:NO REPLY
2065 TSM:FPAR
2082 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
4090 !TSM:FPAR:NO REPLY
4092 TSM:FPAR
4110 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
6118 !TSM:FPAR:NO REPLY
6120 TSM:FPAR
6137 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
8146 !TSM:FPAR:FAIL
8147 TSM:FAIL:CNT=1
8150 TSM:FAIL:DIS
8152 TSF:TDI:TSL
18154 TSM:FAIL:RE-INIT
18156 TSM:INIT
18157 TSM:INIT:TSP OK
18159 TSM:FPAR
18178 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
20186 !TSM:FPAR:NO REPLY
20188 TSM:FPAR
20206 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
22213 !TSM:FPAR:NO REPLY
22215 TSM:FPAR
22234 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
24241 !TSM:FPAR:NO REPLY
24243 TSM:FPAR
24261 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
26268 !TSM:FPAR:FAIL
26269 TSM:FAIL:CNT=2
26271 TSM:FAIL:DIS
26273 TSF:TDI:TSL

[mfalkvidd]

@giebek could you describe the problem, what your setup looks like, and what you have tried so far to troubleshoot it? There are 137 posts in this thread so it is a bit hard to figure out which problem you are referring to.

[rejoe2]

@GieBek

6137 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:

Imo this indicates your node doesn't have a NodeID yet. When using RS485 you have to assign the ID's manually in the sketch, auto doesn't work... (e.g. #define MY_NODE_ID 123)

[GieBek]

Thanks for the answers.
And even more thanks to the rejoe2

#define MY_NODE_ID 123

it helped 100% the transmission went, domoticz sees children.

[dzjr]

hello MySensors friends,

I am currently making a node based on an arduino Mega 2560 with transport via RS-485, the build page says that we should use the MEGA pin 46 & 48, I was wondering if I would like a reference for this. in the sketch.
Second question; can I use pin 47 for the DE pin with:

#define MY_RS485_DE_PIN 47

I haven't tested anything yet, so actually I just ask a lazy question ;)

[APL2017]

Hello, I would like to better understand the concept here. It sounds like we still need a gateway connected to a controller (serial, Ethernet, WiFi, etc.) but the interface between gateway and multiple nodes is over wired RS485 serial interface. Please confirm. Thank you for your great efforts!

[rejoe2]

@apl2017 Yes, also for RS485 variant you'll need a gateway. Only the communication between the gateway and the other nodes is handled over RS485, connected to a second (typically software) serial interface (for remote nodes, you may just use the hardware serial interface to connect the RS485 transceiver, if you do not need debug output; but imo this option is not recommended for beginners).

[dzjr]

@dzjr said in 💬 Building a wired RS485 sensor network:

hello MySensors friends,

I am currently making a node based on an arduino Mega 2560 with transport via RS-485, the build page says that we should use the MEGA pin 46 & 48, I was wondering if I would like a reference for this. in the sketch.
Second question; can I use pin 47 for the DE pin with:

#define MY_RS485_DE_PIN 47

I haven't tested anything yet, so actually I just ask a lazy question ;)

I have it working, so you don't have to adjust anything for a Mega, and pin 47 for DE also works!

[zrom69]

Hi,
in a node how many children can put rs-485
thanks good work

[zrom69]

and it can have blockages if there are sensors that function or even time
thanks

[dzjr]

@zrom69

I have a node with 52 child id's on a Arduino mega,

Arnout 22 of Them receiving data (relay & dimmers) and the rest are sending data, binary, temp/hum, soil moisture and analog data.

Not all the nodes are in use, but i see the data in domoticz.

I dont know how manny childs you want to use, for me 52 on one node are very mutch.

[zrom69]

thank you for your reply
at least 10 children in node and 30 nodes

[zrom69]

@dzjr
thank you for your reply
at least 10 children in node and 30 nodes
@dzjr

[rafal9318]

Hi all,
I have a question about, How to use hardware serial on Arduino Uno (as a sensor) to communicate with gateway via RS485? I added #define MY_RS485_HWSERIAL Serial and it is only working when i turn on debugging (#define MY_DEBUG), how to use hardware serial without debugger ?

[rejoe2]

@zrom69
No real Problem in turning off debug output, at least in 2.3.1 this worked:

// Enable debug prints to serial monitor
//#define MY_DEBUG
//#define MY_DEBUG_LOCAL

#define SN "Zwischenkeller"
#define SV "0.2"

// Enable RS485 transport layer
#define MY_RS485

// Define this to enables DE-pin management on defined pin
#define MY_RS485_DE_PIN 2

// Set RS485 baud rate to use
#define MY_RS485_BAUD_RATE 19200 //57600 //38400 //9600
#define MY_RS485_SOH_COUNT 1
#define MY_RS485_HWSERIAL Serial
#define MY_SPLASH_SCREEN_DISABLED

You may even swap around debugging output from hardware serial to software serial, see basic structure from this post in FHEM forum (german, but most is code).

[rafal9318]

@rejoe2 Thank you. #define MY_SPLASH_SCREEN_DISABLED that was the missing line.
Okey i understand now. Thank you again.

[Flyer]

I am trying to build up a Mysensors with Wired ethernet to the gateway with W5100 and RS485 bewteen nodes, is there something that can help me with this configuration?
Everything looks weel from the monitor serial but domoticz is not able to connect to the gateway!