Stepper Project

Author	Message
Bryan1 Guru Joined: 22/02/2006 Location: Australia Posts: 2082	Posted: 06:08am 16 May 2026         TassyJim said   I think you have to have the zero powered and the I2C set to slave when they are tied together. Jim Jim I did do OPTION SYSTEM I2C GP14, GP15 on the zero and doing an option list shows the I2C there. Now just had some fun found that led wasn't lighting and it turned out this lithuim battery after I gave it a good charge with this Ching board actually killed the battery so went and found my old AAA 4 battery pack and used that for power. Powered it up with zero turned on by the 5V rail and it is still the same when the zero is connected the system I2C is clear, take the zero I2C wires out and the RTC is seen again. Just looked at the manual and for the Option System I2C(2) there isn't an option to set it to slave. Ok just found the I2C Apendix B in the manual and there is I2C Slave Open addrs, send_int, rvc_int. So it does look like this needs to be in a program and not the command line so I need to make 2 subs and run the zero with the I2C wires off the pico 2 Edited 2026-05-16 16:27 by Bryan1