i want to use 20 pulse sensors(rain gauges) with cr6, what is the best way to do it ?
is it possible to connect i2c IO module to cr6 ?
This could get you most of the way https://www.campbellsci.com/sdm-io16
is it possible to use SDM-IO16 as 16 pulse input ?
From the specifications;
from SDM-IO16 spec.. "Maximum Pulse Measurement Interval 15.9375 s"
What this means ? that raingauge pulses(pulse interval usually more than 15s) are nort read?
Maximum Pulse Measurement Interval 15.9375 s
The pulse measurement interval is a limit for frequency measurement. You can count pulses over longer periods. Normally you would simply ask the interface for the pulse count total every minute or perhaps hour if measuring raingauge.
You cannot use multiplexers to read pulses. The solution is to use the CR6 with 2x SDM-IO16.
how many SDM-IO16 can be used with one CR6?
and what distance?
what is max distance between cr6 and SDM-IO16 ?
Up to 15 x SDM-IO16 can be used on one CR6. Giving up to a capacity of 256 pulses inputs through that one SDM port.
The manual for the SDM-IO16 states a maximum SDM cable length of 6m. You may be able to use longer cables, but they will need to be good quality, shielded, etc. In most cases, you simply have to try it out to find whether you can use longer cables. The manual is on the website.