Great job guys, I saw many interested people.
The setup of the automated doll house was fascinating, also my son loved the sensor house (with the ghost)
Only this, I saw myself in one of taken pictures but unfortunately without the MySensor t-shirt ;-(

@mfalkvidd
OK, the before() works!

0 MCO:BGN:INIT NODE,CP=RSNNA--,VER=2.1.1
3 MCO:BGN:BFR
running before() function
2006 TSM:INIT
2011 TSF:WUR:MS=0
2012 TSM:INIT:TSP OK
2014 TSM:INIT:STATID=25
2016 TSF:SID:OK,ID=25
2018 TSM:FPAR
2036 TSF:MSG:SEND,25-25-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
2850 TSF:MSG:READ,0-0-25,s=255,c=3,t=8,pt=1,l=1,sg=0:0
2855 TSF:MSG:FPAR OK,ID=0,D=1
4043 TSM:FPAR:OK

thanks for the cooperation mfalkvidd & rejoe2

Hi Mardah, how this the progress on this project related to the software and testing?
kind regards

hello, maybe a hardware issue
please check

Ref https://forum.mysensors.org/topic/4854/building-a-wired-rs485-sensor-network/99

he 510 ohm pull up and pull down resistors are usually mounted on the master side. Theoretically it
would be best to install it in the middle of your bus line. The 120 ohm termination resistor must always
be used on distances greater than 1 meter and/or baud rates higher than 9600. It’s best to install it as a
norm as noise and reflections will cause havoc on your communication once implemented in the field.
The termination resistors should be mounted at both ends of the bus line. Please note that adding bias
resistors will load the driver IC output. With the indicated values the max number of units on the bus
line is limited to eight 12kΩ, sixteen 24kΩ, or thirty-two 48kΩ units.
For further protection transient suppressors can be installed across the differential lines, from the Vcc to
D+ and from GND to D-.!

I see there is a possibility the combine Ethernet with RS485.
Maybe you can check the setup as they did here:

https://www.openhardware.io/view/649/RS485-Ethernet-Gateway#tabs-comments

https://github.com/feanor-anglin/GetWired-Project/blob/master/GetWired Ethernet Gateway/Gateway.ino

@Flyer said in Building a wired RS485 sensor network:

ng to build

Hi Flyer, As far as I know this is not possible.

This can maybe a solution for having a bridge between RS485 and nRF24L01.

Re: Bridge between RF24 and RS485
https://www.aliexpress.com/item/4000512016252.html?spm=a2g0o.productlist.0.0.7879a483YoMye0&algo_pvid=fd05d00f-4103-4e95-a0c1-f8af3889cffa&algo_expid=fd05d00f-4103-4e95-a0c1-f8af3889cffa-10&btsid=0bb0623b16125608659071681e09c9&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
thanks

Hello all,
is this solution added to the standard MySensor library?
If so, in which version is it implemented?

I want to be sure there are no missing messages when having a list of messages to be sent.

many thanks in advance

@mfalkvidd
OK, the before() works!

0 MCO:BGN:INIT NODE,CP=RSNNA--,VER=2.1.1
3 MCO:BGN:BFR
running before() function
2006 TSM:INIT
2011 TSF:WUR:MS=0
2012 TSM:INIT:TSP OK
2014 TSM:INIT:STATID=25
2016 TSF:SID:OK,ID=25
2018 TSM:FPAR
2036 TSF:MSG:SEND,25-25-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
2850 TSF:MSG:READ,0-0-25,s=255,c=3,t=8,pt=1,l=1,sg=0:0
2855 TSF:MSG:FPAR OK,ID=0,D=1
4043 TSM:FPAR:OK

thanks for the cooperation mfalkvidd & rejoe2

hello rejoe2, you have to power the MAX chip before you come into the loop() because the first time you have to send the node configuration to the gw.
Putting the

pinMode(SENSOR_POWER_PIN, OUTPUT);
digitalWrite(SENSOR_POWER_PIN, HIGH);

code in the setup() is also too late.
If the MAX isn't powered before, you get error messages because the node can't connect to the gw.

btw the DE-PIN is not related to powering the transceiver --> right, it's a similar management, it was an example to find a solution

Is there a way to set an output pin high before sending the init message to the gateway?
so before
// Initialize messages
MyMessage msgTemp(CHILD_ID_TEMP,V_TEMP);
MyMessage sleepMsg(CHILD_ID_SLEEP, V_TEXT);

I want to save energy (300µA) so I want to power the MAX485 only when sending messages.
This is manageable in the sketch (set output pin high after returning from sleep mode, low before sleep) but at first start it isn't. I walked through the libraries but I didn't find the code where the DE pin is managed in order to send data to the MAX chip whch will send the data to the gateway. If I could find this I can make a similar set-up. Thanks in advance.