A soil Moisture sensor used for greenhouse, as Lora Node
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This Soil moisture sensor intends to be a lora node as in the greenhourse lora networks. It detect/report the soil status, and the temperature, to the lora gateway, which is accessable with WIFI, so the remote monitor can get all the points moisture status, and then control the pumps for irrigation。
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Portable Network Graphics (PNG) - 151.85 kB - 07/11/2020 at 06:52 |
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Great improvements on Makerfabs Lora Soil Moisture Sensor V3!!!
For more detail, please check here.
1. There the D5 to turn On/Off the power of 555 and the temperature sensor(AHT10), that you do not always need to check.
2. TLC555 to generate the wave , about 400K.
3. Atmega328, works in 3.3V 8M .
The soil moisture sensor has been loaded the firmware before shipping and it is ready to use as getting to customers hands.
Install 2 AAA batteries.
Plug it into the soil, anywhere you would like.
Then it will begin to work, with broadcasting its unique ID and testing data via Lora, in a few seconds, and fall into sleep with 60 minutes, and then broadcast again(in 2s), repeated again and again.
Please check the wiki for the usage detail.
In the circuit, I don't see why Q2 is necessary. D5 could drive the gate of Q1 directly.
Makerfabs
David
Harri Ohra-aho
panovvv
The voltage of V5 in the high logic might be smaller than VDD if drive the Q1 directly, and it would cause the VCC to never be cut off.