After looking around for different RF solutions, I decided to do it using a cellular router. It does mean you need network coverage but that's usually OK at most race tracks.
The the moment it's only data out of the ECU, but it's a start. The latency looks to be about 0.5 - 1.0 second.
Setup instructions for a wireless monitoring system for the Adaptronic ECUs
Parts you need
1. Digi Wireless Cellular router – eg WR21, WR44
2. Antenna for router
3. Prepaid SIM card
4. Innovate cable (DE9 to 2.5mm headphone)
1. Buy a data SIM. In this case I used a prepaid data SIM from Vodafone ($30 for 4 GB, expires in 1 month). Activate this SIM card
2. Connect an antenna to the router
3. Insert the SIM card into SIM slot 1.
4. Get a laptop, disable the wireless on it and ensure that the Ethernet is set up as DHCP.
5. Connect the laptop’s Ethernet port to the LAN0 port on the router
6. Power up the router
7. Open a web browser and navigate to 192.168.1.1 (or use IPCONFIG to find the router’s IP address if it’s non standard)
8. Set up the APN and the PIN in the router so that it can use the GPRS network
9. Make sure that you can use the internet from this laptop
10. Set up an account with no-ip.org, and download / install the static IP address client to the PC that you will use to monitor the ECU
11. Install the Realport driver as a “device initiated” connection on your monitoring laptop (same one as with the static IP address client). You should be able to see the port status by going into Device Manager, find “multi serial ports” and right click on “properties” – it should say “waiting for connection”.
12. Set up the router to use ASY0 as a Device Initiated Realport, and enter the hostname that you use (eg myhostname.no-ip.org).
13. If your monitoring laptop is not directly connected to the Internet (eg, connects through a router) then you will need to set up the routing tables in the router so that incoming TCP connections on port 8771 go to your monitoring PC. This may require that this machine has a static IP address on your local network.
14. Set up the static IP address client with your host name and verify that it is working correctly.
15. At this point, the router should be able to connect to your monitoring PC. If you are using a separate laptop to connect to the router over Ethernet, you should be able to see your monitoring laptop by typing “telnet myhostname.no-ip.org 8771” and verify that a connection is made.
16. Looking at the Device Initated COM port in Device Manager, you should after some time (less than a minute) that it becomes connected.
17. Save the settings in the router so that it starts up with these settings next time.
Now we have a serial connection, we need to connect the functions we need at each end.
18. Set the Adaptronic “Second Serial (in) port” setting to “Zeitronix Black Box Logger”.
19. Connect the Innovate cable between the D9 port on the router and the “Serial In” port on the ECU (Select ECUs) (or use a straight through D9 male to female cable and use the secondary port on an e420c).
20. Download and install the Zeitronix ZDL software on your monitoring PC, and run it. Select the COM port for the Realport device.http://www.youtube.com/watch?v=5qZZCasoSJ8
- my test bench setuphttp://www.youtube.com/watch?v=k_FvDvOZOHY
- a bit more step by step on how to do it