31-01-2015, 18:27
By your post it's clear, that you have now a good overall view of the system.
So, replying to your doubts:
What Auriol rainmeter sends, is a value with a total rain tips, since last reset (or battery change). It sends this data almost every 36 seconds. Even if one packet is lost or not decoded (it may happen) likely the RX unit will get the next. So in the worst case, the last occurred rain tip is recorded with a 36s delay. The RX unit, records in eeprom last total rain tips every 10 minutos (to save eeprom life, only if they differ from previous).
It's supposed to have the RX (I think you meant say RX, and not TX) unit always connected to a computer or a Raspberry. But your best guess about the IC1 can not be very far from the true.
TX boards come with those two connectors already soldered on the board.
Yes, it can. One will be your main Temp / Hum sensor, the other is treated as an Extra Sensor.
Just a note for the solar radiation portion:
Carefully read all the info already available on the forum. It's very important fully understand how it works, before trying to build it.
With a common 1V - 100mA solar cell, the shunt resistor will be around 1.5 Ohm (here, a 0.1 Ohm will do a great difference).
So, replying to your doubts:
Quote:1 – Since we have no control over when the Auriol rain meter transmits (whenever it rains) there is a good change the signal may at times collide with the TX unit, correct? How does the RX handle this?
What Auriol rainmeter sends, is a value with a total rain tips, since last reset (or battery change). It sends this data almost every 36 seconds. Even if one packet is lost or not decoded (it may happen) likely the RX unit will get the next. So in the worst case, the last occurred rain tip is recorded with a 36s delay. The RX unit, records in eeprom last total rain tips every 10 minutos (to save eeprom life, only if they differ from previous).
Quote:2 – I am missing the ability to log the data without the need to have the TX connected to a computer all day. Is this what the IC1 AT45DB011D-SSH-B Flash Memory is meant for in the long run?
It's supposed to have the RX (I think you meant say RX, and not TX) unit always connected to a computer or a Raspberry. But your best guess about the IC1 can not be very far from the true.
Quote:3 – As far as the Right Angle Telephone Jack6P4C (for plugging the FineOffset sensors) is concerned, there is a note in the parts lists mentioning "My TX board include this parts already soldered on the board" but I do not seem to see these in the board photo. Do I need to buy them separately yes or no?
TX boards come with those two connectors already soldered on the board.
Quote: Will also order a SHT21 particular model capable of taking a 1 meter long cable just for the sake of it (the TX unit can take the two simultaneously).
Yes, it can. One will be your main Temp / Hum sensor, the other is treated as an Extra Sensor.
Just a note for the solar radiation portion:
Carefully read all the info already available on the forum. It's very important fully understand how it works, before trying to build it.
With a common 1V - 100mA solar cell, the shunt resistor will be around 1.5 Ohm (here, a 0.1 Ohm will do a great difference).