Search found 5 matches

by Ralf.E
23 Jan 2017 00:45
Forum: Z-Uno
Topic: Z-Uno - negative temperature value from DS18B20
Replies: 12
Views: 6048

Re: Z-Uno - negative temperature value from DS18B20

I just found the reason... I reduced the space of the array where the addresses of found 1-wire devices is stored. In my test setup I've two DS18B20 attached and assumed it's enough to provide 2x8 bytes for the device address buffer (because of two devices). DS18B20Sensor::findAllSensors(byte * rom)...
by Ralf.E
22 Jan 2017 22:57
Forum: Z-Uno
Topic: Z-Uno - negative temperature value from DS18B20
Replies: 12
Views: 6048

Re: Z-Uno - negative temperature value from DS18B20

michap wrote:Maybe you are using 18B20 with parasite power?
No, not parasite powered.
michap wrote:You are working with sample sketch - - or can you attach your sketch?
Sure - see attached file. It's a modified sample sketch. See the comments for line #25/26 and #34/35...

Thanks
Ralf
by Ralf.E
22 Jan 2017 19:40
Forum: Z-Uno
Topic: Z-Uno - negative temperature value from DS18B20
Replies: 12
Views: 6048

Re: Z-Uno - negative temperature value from DS18B20

Hi, for any reason I run into this problem with two DS18B20 both returning BAD_TEMP. I've applied the patches to ZUNO_OneWire and ZUNO_DS18B20 already and I'm using version 2.0.7. I don't have a real answer on that behavior, but the order of global variables/objects in my sketch makes the DS18B20 wo...
by Ralf.E
17 Jan 2017 21:22
Forum: Z-Uno
Topic: Understanding running/sleeping modes?
Replies: 2
Views: 2022

Understanding running/sleeping modes?

Hi, I've read the Z-Uno reference and through the forum to get an understanding of the available running/sleeping modes, what features a battery powered Z-Uno may support and the sketch may look like. I'm still somewhat unsure regarding setup() and loop(). a) With ZUNO_SLEEPING_MODE_ALWAYS_AWAKE thi...
by Ralf.E
17 Jan 2017 00:21
Forum: Z-Uno
Topic: Recommendation USB to RS232/TTL converter?
Replies: 1
Views: 1448

Recommendation USB to RS232/TTL converter?

Hi, I'm new to Z-Uno and wonder if someone can recommend a suitable USB to RS232/TTL converter? Searching the web I found a lot of different types based on the FTDI, CP210x, PL2303, CH340 devices. Sometimes it is unclear, if these devices support the required 3V3 of the Z-Uno or there are issues wit...