https://devzone.nordicsemi.com/f/nordic-q-a/3730/can-i-use-twi-master-sw-and-hw-togetherHi, I need to use 2 TWI bus (hardware constraint) so I wish to drive one bus with twi_hw_master.c and an other with twi_sw_master.c. Each bus have their own GPIO. Alexen-USTelligent Community 13Thu, 04 Sep 2014 16:04:10 GMThttps://devzone.nordicsemi.com/thread/13524?ContentTypeID=1Thu, 04 Sep 2014 16:04:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36111740-7bd6-43ce-9f42-8c1ef7735db1Petter Myhre<p>There shouldn&#39;t be any problem with using a TWI SW and a TWI HW.</p> <p>Please be aware that the nRF51 Series offers two TWI HW peripherals.</p><div style="clear:both;"></div>