projects:electronics:openhr20
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Table of Contents
openhr20
Collection of links:
- Prosa about programmable thermostats: http://www.oeko.de/oekodoc/1594/2012-450-de.pdf
- Controlling thermostats via Ethernet, powered via PoE: https://www.arduino.cc/en/uploads/Main/PoE-datasheet.pdf
- Network interface with microcontroller (From Elektor): http://www.rs-online.com/designspark/electronics/blog/networker---an-advanced-web-server-with-a-microcrontroller
Connection variant 1
Advantage: Power is fed via Ethernet cable. Disadvantage: Occupies Ethernet cable.
[HR20] <--- Ethernet cable ---> [Converter module] Converter module supplies both power and serial. If two HR20s should be controlled, then the same Ethernet cable can be used. Four wires per module suffice (Gnd, +3.3v, Tx (TTL), Rx (TTL) ). HR20a: Power(Gnd) - Rx: T568A/B White/Blue (4) - Blue (5) cable pair Power(+3.3) - TX: T568B White/Orange (1) - Orange (2) cable pair HR20b: Power(Gnd) - Rx: T568A/B White/Brown (7) - Brown (8) cable pair Power(+3.3) - TX: T568B White/Green (3) - Green (6) cable pair
Connection variant 2
Advantage: Power is fed via PoE Module. Can be routed further if a PoE Router is being used. HR20 with PoE PD module integrated
Connection variant 3
HR20 without PoE PD module. Power for the HR20 and Ethernet/wifi to RS232 converter is fed via a separate power supply.
projects/electronics/openhr20.1452176403.txt.gz · Last modified: 2016/01/07 15:20 by admin