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| en:hardware:homelab:communication [2010/11/21 20:30] – raivo.sell | en:hardware:homelab:communication [2020/07/20 12:00] (current) – external edit 127.0.0.1 | ||
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| - | ====== Communication | + | ====== Communication |
| - | The Communication | + | Please select the module |
| - | The main communication protocol used with this board is a serial interface | + | ---- |
| - | The selection is done by on-board jumpers. | + | |
| - | Simultaneously it is possible to use two parallel UART connections but user can choose (with the selection of jumpers) where the controller UART signals are routed. It is even possible to mix one UART Rx and Tx signals between different connectors. | + | |
| - | For example if one external device only sends the information (e.g. RFID reader) and another only receives (e.g. serial LCD), it is possible to use more than two UART devices in parallel. | + | Version 5.1 |
| + | [[en: | ||
| - | [{{ : | + | ---- |
| + | Version 5.0 | ||
| - | Module is equipped with two DB-9 connectors witch are routed through the TTL converter MAX232. | + | [[en: |
| - | | + | |
| - | NB! This Communication module is not compatible with old Controller module (Atmega128). In case of planning to use this Communication module and old Controller module you need to perform a little modification on the Controller module. | ||
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| - | Do not operate with Communication module before disconnecting the MAX232 controller on the Controller board | ||
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| - | ([[en: | ||
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| - | Reason: The Communication board version 5 is designed for the Controller board version 5. Old Controller board has the RS232 interface on the Controller board and it overdrives the Communication board RS232 interfaces witch results the short circuit. | ||
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| - | ===== Wireless modules ===== | ||
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| - | The module is equipped with the wireless modules, either the ZigBee or Bluetooth ones. | ||
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| - | Following wireless models can be found on the board: | ||
| - | * **ZigBee module ** | ||
| - | * XBee Series 2 {{: | ||
| - | * **Bluetooth** | ||
| - | * Bluetooth {{: | ||
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| - | It is also possible to use the GPS receiver instead of above modules. This module is optional and is provided on the separate request. | ||
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| - | ~~PB~~ | ||
| - | ===== Electrical connections ===== | ||
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| - | The Communication board is connected with the Controller module to the port PE-PB-PD. With jumper it is possible to select which external connector is routed to microcontroller UART ports. | ||
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| - | [{{ : | ||
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| - | ==== RS232 connectors ==== | ||
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| - | DB-9 connectors are for connecting the external devices, another controller or PC in case other party meets the RS232 standard interface. If one want to connect two Controller modules the cross-wired cable (also known as zero-modem cable) must be used. | ||
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| - | [{{ : | ||
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| - | ==== UART connector ==== | ||
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| - | Several devices has UART interface instead of RS232. The Communication board has one UART connector under the wireless module. | ||
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| - | UART connector pins: | ||
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| - | ^ Pin ^ Signal ^ | ||
| - | | 1 | Tx | | ||
| - | | 2 | Rx | | ||
| - | | 3 | Vcc (5V) | | ||
| - | | 4 | GND | | ||
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| - | ==== Wireless connector ==== | ||
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| - | Two 2 mm socket rows are intended for the wireless module connection e.g. Zigbee, Bluetooth or GPS. Only UART signals and 3,3 V power lines are connected as shown on the table below. | ||
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| - | ^ Pin ^ Signal ^ | ||
| - | | 1 | Vcc (3V3) | | ||
| - | | 2 | Rx | | ||
| - | | 3 | Tx | | ||
| - | | 10 | GND | | ||
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| - | [{{ : | ||
