hr25_thermostat
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hr25_thermostat [2013/11/04 22:31] – [Integrate the additional electronics into the housing] GoHoHa | hr25_thermostat [2013/11/06 20:14] – [Open the HR25 thermostat] typo corrected Inhumierer | ||
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- | The Honeywell Rondostat HR25 is an electronic | + | The Honeywell Rondostat HR25 is an electronically |
- | For integration into an smarthomatic network it needs a RFM12B transmitter and a new firmware. | + | For integration into a smarthomatic network it needs a RFM12B transmitter and a new firmware. |
- | To keep the programming scheme similar to other smarthomatic devices, | + | To keep the programming scheme similar to other smarthomatic devices, |
The housing is hacker friendly, it opens without the risk of breaking it. | The housing is hacker friendly, it opens without the risk of breaking it. | ||
- | The electronics is based on a ATmega329P processor. | + | The electronics is based on an ATmega329P processor. |
Initial idea is based on the development done for the HR20 thermostat, the OpenHR20 project. | Initial idea is based on the development done for the HR20 thermostat, the OpenHR20 project. | ||
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To open the housing, lift the turn wheel with a flat piece of plastic to avoid scratches. | To open the housing, lift the turn wheel with a flat piece of plastic to avoid scratches. | ||
It snaps off and you can look into the device (Figure 2). | It snaps off and you can look into the device (Figure 2). | ||
- | Than remove the lock pins using the same plastic lever (see Figure 3, arrows to left and right). | + | Then remove the lock pins using the same plastic lever (see Figure 3, arrows to left and right). |
After pushing the 4 notches (see arrows in figure 5), the housing snaps open. | After pushing the 4 notches (see arrows in figure 5), the housing snaps open. | ||
Unscrew the PCB (just 1 screw) and slide it out. | Unscrew the PCB (just 1 screw) and slide it out. |
hr25_thermostat.txt · Last modified: 2013/11/06 20:17 by Inhumierer