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Integration into Your Own Hardware
Mechanical Integration
The YUKI Module A1 is designed as a pluggable module for integration into customer-specific hardware platforms. It is typically connected via a 2.54 mm pin header or via a dedicated socket. The mechanical design allows space-saving installation, provided the surrounding design takes the following points into account:
- The module requires clearance for antenna connectors (at least 10 mm radial).
- The antennas must not be shadowed by metal parts or conductive surfaces.
- For vertical installation, ensure sufficient mechanical fixation (e.g. screw posts, standoffs).
Snap-in Mounting
Snap-in mounting is very maintenance-friendly but does not offer the highest resilience against shock and vibration. In addition, suitable snap-in holders are not available in all heights matching the miniPCIe connector.
Screwed Mounting
Screwed mounting is very stable over the long term, even when the product is operated in harsh environments. The screws can be secured with threadlocker to protect against vibration. Furthermore, the required standoffs are available from many manufacturers in different heights and can be adapted to the respective miniPCIe connector.
| Socket | Mounting | Clearance Height | Overall Height |
|---|---|---|---|
| TE Connectivity 1775838-2 | JAE MM60-EZH059-B5-R650 | 3 mm | 7.1 mm |
| TE Connectivity 1759546-1 | Würth 9774070243R 2 × M2×6 mm screw | 6.9 mm | 10.9 mm |
Electrical Connection
The module is electrically connected via a multi-pin interface. The typical signal connections are:
- UART (RX, TX, RTS, CTS) for communication with the host
- RESET input for targeted restarting of the module
- VCC and GND for power supply
- GPIOs for enabling Bluetooth, power save, and debug purposes
The UART interface operates at 3.3 V levels and is not tolerant of higher input voltages. Correct wiring of the pins is mandatory in order to avoid damage to the module.
| Pin | Signal | Direction | Description | Note |
|---|---|---|---|---|
| 1 | VCC | IN | 3.3 V | |
| 2 | GND | IN | Ground | |
| 3 | VCC | IN | 3.3 V | |
| 4 | GND | IN | Ground | |
| 5 | VCC | IN | 3.3 V | |
| 6 | GND | IN | Ground | |
| 7 | VCC | IN | 3.3 V | |
| 8 | GND | IN | Ground | |
| 13 | RESET | IN | High-active reset | 10 ms high resets the module |
| 17 | SLEEP | IN | Power-save on/off (low-active) | As long as the line is pulled low, the module enters a low-power sleep mode and draws only a few µA of current. |
| 18 | SYNC | IN | Cloud sync | A 10 ms high pulse synchronises all values with the cloud. Caution: The module automatically synchronises with the cloud at regular intervals. A manual sync should only be performed when values need to be transmitted to the cloud in a time-critical manner. |
| 20 | BLE_EN | IN | Bluetooth enable (high-active) | Enable Bluetooth |
| 22 | GPIO0 | OUT | Configurable output | GPIO outputs 0 and 1 can be freely controlled via the cloud or the internal scripting engine. |
| 24 | GPIO1 | OUT | Configurable output | |
| 26 | GPIO2 | OUT | Error indicator (high-active) | Active when a network fault is present. Details can be read via the UART interface. |
| 27 | UART_RTS | IN | Request To Send (high-active) | Hardware flow control. Host is ready to receive data from the YUKI Module. |
| 28 | UART_CTS | OUT | Clear To Send (high-active) | Hardware flow control. YUKI module is ready to receive data from the host. |
| 33 | UART_TX | OUT | Transmit | Data output (YUKI Module → Host) |
| 35 | UART_RX | IN | Receive | Data input (Host → YUKI module) |
Notes on Antenna Routing
Correct antenna routing is crucial for reliable radio operation. The antenna connectors are implemented as U.FL jacks and are intended for external antennas. The following points must be observed:
- Use only suitable, matched antennas (see section 2).
- Antenna cables should be as short as possible (<20 cm) and well shielded.
- Cable routing must not have tight bending radii and should not run parallel to interference sources (e.g. clock lines).
- The antennas should be mounted with sufficient distance from conductive surfaces and metal housings. Direct contact with enclosure parts must be avoided.
Power Management and Sleep Mode
The module has a dedicated SLEEP input pin. When this is activated, the module switches to a power-saving sleep state. In this state the radio connections (LTE, GNSS, BLE) are deactivated and the module reduces its activity to a minimum.
To wake the module, an appropriate signal on the SLEEP pin is sufficient.
The exact current consumption in sleep mode depends on the environment and supply and should be measured on site. An automatic sleep timer is not implemented.