Problem to connect with connectblue OBS-421

[jean-marc]

Using OBS-421 from Connectblue as Central. Using simple AT command to connect and get data. Can connect successfully with Cypress BLE as well as the TI sensortag and get data from them. I cannot connect with nRF51, nRF52 at all. Cannot trace any error yet trying to debug by the serial port.

Unfortunately did not investigate with any sniffer or else. Just want to know if there is a known problem with the way nRFx connection and the way Connectblue handle this.

BTW: Try the central with nRF52 and failed so far. Another topic for later. :-)

Thank you for some help. I would like to use nRFx products in this configuration. jean-marc

[hcr]

Hi Jean-Marc,

nRF51/52 are using random static adresses and if you don't specify this in the connect command on OBS421 it will assume a public address. This will give the result you describe, OBS421 will not be able to connect.

The solution is to append an r to the address in the connect command, e.g. 0012F3000101 -> 0012F3000101r

If this doesn't solve your problem, please post the complete connect command you are using and I can have a look.

Best regards,

Henning

u-blox (former connectBlue)

[jean-marc]

Thank you Henning for the followup. I tried and it does not work. As mentioned below, on Wireshark I can see that the command never goes out from the OBS421. The command I send is AT*ADCP=r,17,0,0 (send the r final this time). I do the same with the other brands (TI or Cypress) and it works. I send a request also to U-blox but never received any answers. I appreciate yours. I could send you more material for this subject.