multiple 4-Relays on same I2C bus

Reply to multiple 4-Relays on same I2C bus on Sat, 09 Apr 2022 20:08:49 GMT

ajb2k3 — Sat, 09 Apr 2022 20:08:49 GMT

@bartblommaerts said in multiple 4-Relays on same I2C bus:

Oh the PaHub>2< Unit :/

its not available yet in the local stores. And the Pa.Hub (version 1) is sold out.

You're better off ordering direct from M5Stack

Reply to multiple 4-Relays on same I2C bus on Sat, 09 Apr 2022 13:23:54 GMT

bartblommaerts — Sat, 09 Apr 2022 13:23:54 GMT

Oh the PaHub>2< Unit :/

its not available yet in the local stores. And the Pa.Hub (version 1) is sold out.

Reply to multiple 4-Relays on same I2C bus on Sat, 09 Apr 2022 11:52:02 GMT

ajb2k3 — Sat, 09 Apr 2022 11:52:02 GMT

@felmue said in multiple 4-Relays on same I2C bus:

Hello @bartblommaerts

from what I can tell the 4-relay unit has a fixed I2C address (0x26) so connecting more than one directly doesn't work (I2C address conflict).

However you should be able to control multiple 4-Relay units through a PaHub2.

Note: I do not have the necessary units to test whether it actually works or not. My conclusion is solely from looking at the documentation.

Thanks
Felix

@felmue is correct. The Address is hard coded and so you need to use the I2C hub for more that 1 unit.

Reply to multiple 4-Relays on same I2C bus on Sat, 09 Apr 2022 10:43:19 GMT

felmue — Sat, 09 Apr 2022 10:43:19 GMT

Hello @bartblommaerts

from what I can tell the 4-relay unit has a fixed I2C address (0x26) so connecting more than one directly doesn't work (I2C address conflict).

However you should be able to control multiple 4-Relay units through a PaHub2.

Note: I do not have the necessary units to test whether it actually works or not. My conclusion is solely from looking at the documentation.

Thanks
Felix