# Datasheet Gateway ## Features * Pluggable Cloud Connectivity (WiFi, LTE-M, GSM, ETH\*) * OTA Firmware Updates * OTA Adapter Updates * GNSS (GPS/GLONASS/BD) * 3V3 and 5V UART serial input * 20 GPIOs * 3.7V Battery-/5V Power Supply mode * Input Voltage Options: USB, Screw Terminal, Battery * 5V /2A Output power supply * LiPo Charging * * overcharge protection (4.25V) * overdischarge protection (2.90V) * trickle charge * Power Saving Mode * Dimensions: 47.88mm x 70.10mm x 7.90mm (w x d x h) \*Note: The optional Ethernet cloud connectivity module is not part of this datasheet. ## Applications The Gateway is intended for monitoring and control in areas without any access to Ethernet or WiFi. The gateway is suited for solar operation in conjunction with a sufficiently large rechargeable battery. * Smart Farming * Smart City * Asset Tracking * Weather Station * Environmental Monitoring * Extension for mobile/handheld instruments ## General Description ![PCB layout of the gateway.](/files/-MV8HqGPOxMsRW0Wmbnm) ![Blockdiagram and pinout for the Gateway. The sketched component is optional.](/files/-MV8cD9MJlymsAvO7UJa) ### **General information** This document gives a functional overview of the OneIoT Gateway and describes electronic specification, RF specifications, interfaces as well as product dimensions. This datasheet is valid for the following products: | Product | Version | | -------------------- | ------- | | OneIoT Gateway - LTE | V2 | If some products differ for some characteristics it will be mentioned in the corresponding section. ### **Copyright** This datasheet contains technical information that are intellectual property of the OneIoT UG. Replicating, forwarding, using or communicating the contents of this document are forbidden without consent of OneIoT UG. Copyright OneIoT UG , 2021 ### Functional Overview #### **Power supply** The gateway can either be powered by USB with 5V and >0.7A. Note that most USB outputs only provide 0.5A of current. Therefore, the gateway should only be powered with the included power supply or one that can supply >0.7A. Another option is to battery power the device. The battery can be charged via USB. Furthermore, you can provide power via the screw terminal with 5V and >0.7A. This power interface can also be used to charge the battery. #### **SIM interface** The gateway has a micro-SIM interface. The SIM card will be provided with the gateway and can not be used with other devices. #### Cloud connectivity The Gateway comes with four different connection modes: * Wi-Fi connection * LTE-M * NB-IoT * GSM/EGPRS (fallback) For details on how to configure these modes, have a look at the [Gateway Application Manual.](/gateway/gateway-manual.md) #### **Info LED State** There is a blue info LED on the board, which informs about the current state of the gateway. | Battery Status | LED (blue) | | --------------------------------------------- | ------------------------- | | Trying to establish a connection to the cloud | Fast blinking (10/s) | | Error, trying to reconnect | Slow blinking (1/s) | | Normal operation, connection established | Very slow blinking (1/5s) | #### Battery Mode The gateway can be operated with batteries, e.g., in conjunction with a solar module. The battery will be charged and protected by circuits provided by the gateway. There are two indicator LED to provide information about the charging state of the battery. #### !Only use High-Quality 3.7V LiPos with the gateway.! **Indicator Light State** | Battery Status | LED (red) | LED (green) | | ---------------------------------------------------- | -------------- | -------------- | | Charging | permanently on | off | | Charging finished | off | permanently on | | Supply Voltage to high; Battery voltage to high/low; | off | off | | No battery connected | flashing | permanently on | For details and further features have a look at the [TP4056 datasheet.](https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf) #### Satellite navigation (GNSS) TBD ## Electrical Specifications Unless otherwise noted, all specification hold over operating free-air temperature range of -40°C to 85°C (TA). The normal operation temperature for the mobile modem is -30°C to 85°C. The performance of the modem will be slightly reduced outside the normal temperature range. ### Absolute Maximum Ratings | Symbol | Parameter | Min | Max | Unit | | ------ | ----------------------- | ---- | --- | ---- | | VIN | Power supply voltage | -0.3 | 5.5 | V | | I\_OUT | Output current supplied | - | 2 | A | | TS | Storage Temperature | -40 | 90 | °C | ### Recommended Operating Conditions | Symbol | Parameter | Min | Typical | Max | Unit | | ------ | ----------------------------------------- | ---- | ------- | --- | ---- | | VIN | Power supply voltage | 3.6 | 5.0 | 5.5 | V | | I\_VIN | Current delivered to the gateway | 0.7 | - | - | A | | I\_GSM | Current delivered to support GSM fallback | 2.1A | - | - | A | | TA | Free-air operating temperature | -40 | - | 85 | °C | ### Battery Mode | Parameter | Value | | ----------------------------- | ------------ | | Input Supply Voltage | -0.3V - 8.0V | | Input Current (Programmable) | < 1000mA | | Charge Voltage (Programmable) | 4.2V | | Trickle Charge Threshold | 2.9V | ### Power Consumption The following values have all been measured at 25°C, 45% humidity. | Mode | Power consumption | | ----------------------------- | ------------------ | | NB-IoT/LTE-M/Connection Setup | 0.479W/0.576W/1W\* | | WiFi mode | 0.920W | | Idle | 0.132W | | Sleep Mode | 0.010W | | LEDs | \~0.100W | \*Power consumption with a mobile connection depends on the signal strength and the used bands and category. For more details, consult the [SIM7000E datasheet](https://simcom.ee/documents/SIM7000E/SIM7000%20Hardware%20Design_V1.05.pdf). ## RF Characteristics ### Wi-Fi The gateway supports Wi-Fi 802.11 b/g/n at a frequency rane of 2.4GHz \~ 2.5GHz. For the Wi-Fi RF characteristics, take a look at the [ESP32 datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf), section 5.6. ### LTE The gateway supports LTE-FDD B3, B8, B20 and B28 (LTE-M1 and LTE-NB1). For the LTE RF characteristics, take a look at the [SIM7000E datasheet](https://simcom.ee/documents/SIM7000E/SIM7000%20Hardware%20Design_V1.05.pdf), section 4.1. ### GPRS As a fallback option, the gateway is also able to establish the cloud connection via GPRS. It supports EGSM 900MHz as well as DCS 1800MHz. For the GPRS RF characteristics, take a look at the [SIM7000E datasheet](https://simcom.ee/documents/SIM7000E/SIM7000%20Hardware%20Design_V1.05.pdf), section 4.1. ### GNSS The gateway provides location information via GNSS enhanced with network information. It supports GPS, GLONASS and BD. For the GPRS RF characteristics, take a look at the [SIM7000E datasheet](https://simcom.ee/documents/SIM7000E/SIM7000%20Hardware%20Design_V1.05.pdf), section 4.3. ## ESD Notes TBD ## Interface applications ### UART Interface The gateway provides an 3-wire UART interface to connected devices. The recommended logic level for this interface is 3V3 but it also operates with 5V logic level. It supports RS232 and RS485 and can communicate at a speed of up to Mbps. ### GPIOs For the GPIOs DC characteristics, take a look at the [ESP32 datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf), since they are directly connected to the corresponding ESP32 pins. ## Further characteristics For further information about electrical characteristics and RF characteristics, please consult the datasheets of the Espressif ESP32 and SIMCOM SIM7000E. ## Power saving mode The gateway provides a power saving mode. This can be turned on via the serial protocol. Have a look at the protocol specification for more details. In a power saving setting, it is further recommended to remove all LEDs from the board. There **Gateway base** has 3 LEDs (2 for the Battery and 1 info LED). Furthermore, depending on your **Cloud-Adapter**, there might be further LEDs. The LEDs can be safely removed from the board and adapters. This will reduce the power dissipation by up to 100*mW* depending on your setting. ## Gateway dimensions ![ 47.879mm x 70.104mm](/files/-MVDYrNvYYi0IS9IHK7N) The height of the board depends on the selected components. The PCB has a height of 1.4mm and the largest component (power switch) 6.50mm totalling 7.9mm. ## Case dimensions (optional) ![57.0mm x 87.0mm x 22.0 mm (width x depth x height)](/files/-MVDUSkzx8eRbP5UYT5w) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.oneiot.de/gateway/gateway-datasheet.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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