ESP8266 Community Forum

- Wed Dec 09, 2015 9:47 pm #36123 Hi - Brilliant book, very comprehensive, clear and well written!
Thank you for your efforts Neil.

I THINK there is a typo in the PCF8574 section (top of page 129 in Dec edition)...
According to the 7 bit address table shown - 0 0 1 0 A2 A1 A0 , shouldn't the addresses for the PCF8574 in the following table start at 0x10?

The PCF8574A entries look right - both tables agree, its just the (non-A) part that looks wrong to me

Again, great work
Regards
Les Otter UK

- Thu Dec 10, 2015 6:06 am #36151 Howdy Les, I think you are 110% correct ... let me study some data sheets and fix-up for the next release. Many thanks for reporting.

Free ESP8266 book available for download here.

- Thu Dec 10, 2015 7:37 am #36156 You're welcome
Just took a look at the datasheet and it seems the first table should be
0 1 0 0 A2 A1 A0
not
0 0 1 0 A2 A1 A0
..which would make the second table correct (0x20 start addresss)

Cheers
Les

- Fri Dec 11, 2015 8:49 am #36219 Neil

I recently purchased the Doit ESP-12E development board for the ESP8266, and I intend to experiment with it.

I have perused your ebook "Kolban's Book on ESP8266", and it has given me valuable insight into using the ESP8266.

Thank you for publishing that book.


Regards

Ray Carpenter