I am trying to use my raspberry to control a PIC16F677 chip with I2C. The board is a TylorEdge SmartNixie IN18 1361 (http://www.tayloredge.com/storefront/Sm ... 8/1361.pdf).
I have hooked up the SDA and SCL lines. I know the chip is getting 5v and ground. Also in series, I have hooked up a PCA95555. That board is a two chip i2c expansion (http://www.bristolwatch.com/arduino/arduino6.htm).
When powered up. I can see the PCA95555 chip at 0x20 and 0x21, but not the PIC16F677. The address for the PIC16F677 should be 0x1E. The hookup is as follows:
Raspberry Pi TES1388 -DS2 TES1388 - U2 PCA95555
SDA (3) --> SDA - (A7) --> SDA (U2-1) --> SDA (9)
SCL (5) --> SCL - (A6) --> SCL (U2-2) --> SDL (10)
What am I missing?