light travels at about 30cm/nS. The Uno can capture +/- 1μS at best, so, at best, your accuracy will be +/- 30m.

In the nRF24 library I'm using, there timeouts, meaning that you will never know exactly how many μS a network.read() will take, adding multiples of 30m to the best case.

+/-2m is not possible using an Uno and any radio.

Try two GPS's, one on each module with each Nano and take the difference between the two. I'm pretty sure that would meet your spec. (Amazon) Yes, one GPS is rather inaccurate, but the inaccuracy is the same on two relatively close (google "differential GPS") That would be a cool project! And! you could log the track! You can find less expensive modules on AliExpress (caveat emptor and 20-90 days delivery)

DIYmall 6M GPS Module with EEPROM for MWC/AeroQuad with Antenna for Arduino Flight Control Aircraft

$17.99

1 available

(yeah, this is really old in tech years, but I post in the event someone stumbles upon this.) I actually tried the GPS suggestion. I was wrong about the error between two identical GPS's. It's quite large. Check out the other suggestion first.

(yeah, this is really old in tech years, but I post in the event someone stumbles upon this.) I actually tried the GPS suggestion. I was wrong about the error between two identical GPS's. It's quite large. Check out the other suggestion first.

I have an Arduino Mesh network (see https://tmrh20.github.io/RF24Mesh/) (master and 4 nodes)
networkChannel 120, networkDataRate RF24_1MBPS, nodes 0-4

Now I want to have my master be an RPi because it can talk to the real world.

It looks like I have the RPi wired up and software loaded (per https://www.mysensors.org/build/raspberry). Now I need to know how to talk to my Arduino's.

Now how do I talk to my Arduino's?

o- general description of what you are trying to do
Raspberry Pi controller with serial gateway with nrf24l01+ to connect to Arduino's
o- the exact configure command you used
git clone https://github.com/mysensors/MySensors.git --branch master
cd MySensors
./configure --my-transport=rf24 --my-gateway=serial --my-serial-is-pty --my-serial-port=/dev/ttyMySensorsGateway
make
sudo ./bin/mysgw
[reboot RPi]
cd MySensors
sudo make install
sudo systemctl enable mysgw.service
sudo systemctl start mysgw.service
ls -als /dev/ttyMySensorsGateway [yeilds: 0 lrwxrwxrwx 1 root root 10 Apr 9 19:22 /dev/ttyMySensorsGateway -> /dev/pts/1]

o- the output from the test
Apr 09 18:47:32 INFO Config file /etc/mysensors.conf does not exist, creating new file.
Apr 09 18:47:32 INFO Starting gateway...
Apr 09 18:47:32 INFO Protocol version - 2.3.2
Apr 09 18:47:32 DEBUG Serial port /dev/ttyMySensorsGateway (115200 baud) created
Apr 09 18:47:32 INFO EEPROM file /etc/mysensors.eeprom does not exist, creating new file.
Apr 09 18:47:32 DEBUG MCO:BGN:INIT GW,CP=RNNGL---,FQ=NA,REL=255,VER=2.3.2
Apr 09 18:47:32 DEBUG TSF:LRT:OK
Apr 09 18:47:32 DEBUG TSM:INIT
Apr 09 18:47:32 DEBUG TSF:WUR:MS=0
Apr 09 18:47:32 DEBUG TSM:INIT:TSP OK
Apr 09 18:47:32 DEBUG TSM:INIT:GW MODE
Apr 09 18:47:32 DEBUG TSM:READY:ID=0,PAR=0,DIS=0
Apr 09 18:47:32 DEBUG MCO:REG:NOT NEEDED
Apr 09 18:47:32 DEBUG MCO:BGN:STP
Apr 09 18:47:32 DEBUG MCO:BGN:INIT OK,TSP=1
Apr 09 18:47:32 DEBUG TSM:READY:NWD REQ
Apr 09 18:47:32 DEBUG ?TSF:MSG:SEND,0-0-255-255,s=255,c=3,t=20,pt=0,l=0,sg=0,ft=0,st=OK:
[did not return to command prompt]
o- the settings you used in your controller
n/a

In the old days, yes, in the days before DHCP we had a similar problem on our cat 2 ethernet. I went over to the other guy and told him he was using my IP address. We went to the sysadmin and we agreed that he would use this range and I would use that. Done.

I suggest you talk to your neighbor. I suspect that they are clueless that they're messing with your network.

Consider this a lesson in design for robust networks and being neighborly.

light travels at about 30cm/nS. The Uno can capture +/- 1μS at best, so, at best, your accuracy will be +/- 30m.

In the nRF24 library I'm using, there timeouts, meaning that you will never know exactly how many μS a network.read() will take, adding multiples of 30m to the best case.

+/-2m is not possible using an Uno and any radio.

Try two GPS's, one on each module with each Nano and take the difference between the two. I'm pretty sure that would meet your spec. (Amazon) Yes, one GPS is rather inaccurate, but the inaccuracy is the same on two relatively close (google "differential GPS") That would be a cool project! And! you could log the track! You can find less expensive modules on AliExpress (caveat emptor and 20-90 days delivery)

DIYmall 6M GPS Module with EEPROM for MWC/AeroQuad with Antenna for Arduino Flight Control Aircraft

$17.99

1 available