door_access_controllers
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door_access_controllers [2019-02-24 00:39] – [PCB] tim | door_access_controllers [2019-09-22 22:08] – tim | ||
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The Hacklab door controllers are based on an ESP8266 wifi microcontroller and a PN532 NFC reader module. One controller is installed for each door, and each controller can operate a single 12V channel for an electric door release or magnetic lock. Inputs can be connected for door open/closed reed switch, exit request and local lock/unlock " | The Hacklab door controllers are based on an ESP8266 wifi microcontroller and a PN532 NFC reader module. One controller is installed for each door, and each controller can operate a single 12V channel for an electric door release or magnetic lock. Inputs can be connected for door open/closed reed switch, exit request and local lock/unlock " | ||
- | ===== PCB ===== | + | ===== PCB v2 ===== |
- | https:// | + | https:// |
^ Reference ^ Component ^ Farnell ^ | ^ Reference ^ Component ^ Farnell ^ | ||
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Errata: a generic through-hole flyback diode should be fitted between GND and 12V_OUT, on the underside of the screw terminal. | Errata: a generic through-hole flyback diode should be fitted between GND and 12V_OUT, on the underside of the screw terminal. | ||
- | ==== Lessons Learned | + | ==== PCB v3 ==== |
+ | |||
+ | * Off-the-shelf DC-DC converter instead of custom circuit | ||
+ | * Split voltages 5V (for piezo and NFC module) and 3.3V for ESP8266 | ||
+ | * Flyback diode on 12V switched output | ||
+ | * TVS diodes removed | ||
+ | * Normally-closed relay option removed | ||
+ | * Pull-up removed from piezo | ||
+ | |||
+ | ==== Future ==== | ||
+ | |||
+ | Future versions may use the Wemos D1 Mini to aid maintainability. Alternatively, | ||
- | Future PCB revisions are likely to be based on a Wemos D1 Mini module to reduce component count and allow easier debugging. The onboard DC-DC converter will be replaced with an off-the-shelf "LDO replacement" | ||
===== Controller Unit ===== | ===== Controller Unit ===== | ||
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* [[http:// | * [[http:// | ||
* [[http:// | * [[http:// | ||
- | * Cat 5 or other cable with at least 7 cores | + | * Alarm cable with at least 7 cores (Cat5 can be used but is not recommended) |
The reader enclosure is formed from three layers of 3mm black acrylic. The layers should be joined with cyanoacrylate adhesive. | The reader enclosure is formed from three layers of 3mm black acrylic. The layers should be joined with cyanoacrylate adhesive. | ||
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Bend and cut the LED leads to the correct shape and length. Solder the LED and cable before gluing the module into the enclosure. | Bend and cut the LED leads to the correct shape and length. Solder the LED and cable before gluing the module into the enclosure. | ||
- | Cat 5 cable colours: | + | Cable colours |
- | | blue | GND | | + | ^ Pin ^ G1/G2/G8 ^ G11 (and photos) ^ |
- | | green | VCC | | + | | GND | blue | blue | |
- | | brown | RST | | + | | VCC | green | orange |
- | | orange | SDA | | + | | RST | brown | brown | |
- | | white-green | + | | SDA | orange | green | |
- | | white-brown | LED +ve | | + | | SCL | white-green | white-green | |
- | | white-blue | Piezo | | + | | LED +ve | white-brown | white-brown |
- | | white-orange | + | | Piezo | white-blue | white-blue |
- | Note that on the G11 door and **in the photos**, orange=VCC and green=SDA. | + | The LED should be connected between LED and GND, with a 120R series resistor. To avoid damaging |
- | The LED should be connected between white-brown and GND (blue), with a 120R series resistor. To avoid damaging the LED, use hot-melt glue to secure it in place (not cyanoacrylate). | + | The piezo should be connected between |
- | + | ||
- | The piezo should be connected between | + | |
Test the reader and controller together before securing the reader to the wall with double-sided adhesive foam tape. | Test the reader and controller together before securing the reader to the wall with double-sided adhesive foam tape. | ||
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===== Software ===== | ===== Software ===== | ||
- | Two versions of firmware and server back-end are currently in operation. | + | Features: |
- | + | ||
- | Common features: | + | |
* Ability to read any 13.54MHz ISO-14443 Type A token including MIFARE Classic/ | * Ability to read any 13.54MHz ISO-14443 Type A token including MIFARE Classic/ | ||
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* Remote enable/ | * Remote enable/ | ||
* Input DC voltage measurement, | * Input DC voltage measurement, | ||
- | + | * TLS-enabled TCP networking | |
- | Legacy/ | + | |
- | + | ||
- | New: A new firmware and back-end use TLS-enabled TCP networking, so do not require a special wifi network. The modern codebase is better-written, | + | |
door_access_controllers.txt · Last modified: 2023-04-08 10:24 by tim