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== Chip == [[文件:SX1276-77-78-79 .png]] <br> === Band === * Band 1 (HF): 862 (*779) - 1020 (*960) MHz ---> SX1276/77/79 * Band 2 (LF): 410 - 525 (*480) MHz ---> SX1276/77/78/79 * Band 3 (LF): 137 - 175 (*160) MHz ---> SX1276/77/78/79 '''SX1279:''' * Band 1: 779 - 960 MHz * Band 2: 410 - 480 MHz * Band 3: 137 - 160 MHz '''SX1278:''' * Band 2 (LF): 410 - 525 MHz * Band 3 (LF): 137 - 175 MHz '''SX1276''': * Band 1 (HF): 862 - 1020 MHz * Band 2 (LF): 410 - 525 MHz * Band 3 (LF): 137 - 175 MHz <br> === SX1278 === * Low RX current of 9.9 mA, 200 nA register retention * 168 dB maximum link budget * +20 dBm - 100 mW constant RF output vs. V supply * +14 dBm high efficiency PA * Programmable bit rate up to 300 kbps * High sensitivity: down to -148 dBm * Power Supply: 1.8 ~ 3.7V (17dBm), 2.4 ~ 3.7V (20dBm) * [http://www.semtech.com/images/datasheet/sx1276_77_78_79.pdf SX1278 Datasheet] * http://www.semtech.com/wireless-rf/rf-transceivers/sx1278/ * http://www.semtech.com/images/datasheet/LoraLowEnergyDesign_STD.pdf * http://www.semtech.com/images/datasheet/LoraDesignGuide_STD.pdf * http://www.semtech.com/images/datasheet/AN1200.19_SX127x_RefDesign_STD.pdf * http://www.semtech.com/images/datasheet/an120014-xo-guidance-lora-modulation.pdf * [http://www.semtech.com/images/datasheet/SX1272_settings_for_LoRaWAN_v2.0.pdf Recommended SX1272 Settings for EU868 LoRaWAN Network Operation] <br><br> === SX1301 === The SX1301 digital baseband chip is a massive digital signal processing engine specifically designed to offer breakthrough gateway capabilities in the ISM bands worldwide. It integrates the LORA concentrator IP. [[文件:Sx1301-bd.gif]] * Up to -142 dBm sensitivity with SX1257 or SX1255 Tx/Rx front-end * -139.5 dBm with included ref design * 70 dB CW interferer rejection at c1 MHz offset * Able to operate with negative SNR * CCR up to 9 dB * Emulates 49x LoRa demodulators and 1x (G)FSK demodulator * Dual digital Tx & Rx radio front-end interfaces * 10 programmable parallel demodulation paths * Dynamic data-rate adaptation (ADR) * True antenna diversity or simultaneous dual-band operation [http://www.semtech.com/images/datasheet/sx1301.pdf SX1301 Datasheet] <br><br> === SX126x === * SX1262: (+22dBm), 150-960 MHz (e.g. 430/490MHz, 868/915MHz), Rx Current 4.6mA, QFN 4x4mm * SX1261: (+15dBm), 150-960 MHz (e.g. 430/490MHz, 868/915MHz), Rx Current 4.6mA, QFN 4x4mm * SX1268: (+22dBm), 410-810 MHz, Rx Current 4.6mA, QFN 4x4mm * 4.2 mA of active receive current consumption * 25 mA TX @ 14dbm * Programmable bit rate up to 62.5 kbps LoRa and 300 kbps FSK * High sensitivity: down to -148 dBm * https://www.semtech.com/products/wireless-rf/lora-transceivers/sx1262 <br><br> === Sensors === * [http://wiki.jackslab.org/ADC#MCP3421 MCP3421]: 2.7V ~ 5.5V, 145 uA (Continuous Conversion) or 39 uA (One-Shot Conversion with 1 SPS) * [https://www.sensirion.com/en/environmental-sensors/humidity-sensors/digital-humidity-sensors-for-various-applications/ SHT3x]: 2.15 ~ 5.5 V, 4.8µW (at 2.4 V, low repeatability, 1 measurement / s) ADDR: 0x44(LOW)/0x45(HIGH) * [[SHT2x]]: 2.1 ~ 3.6 V, 3.2µW (at 8 bit, 1 measurement / s, ADDR: 0x40) * [https://cdn-shop.adafruit.com/datasheets/TSL2561.pdf TSL2561]: 2.7 ~ 3.6V, 0.75 mW Typical, ADDR: 0x29(LOW)/0x39(FLOAT)/0x49(HIGH) * [[BH1750]]: 2.4 - 3.6V, 120uA, powerdown current 1uA, ADDR: 0x5C(HIGH) / 0x23(LOW) * [https://cdn-shop.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf BMP180]: 1.8~3.6V, 5µA at 1 sample / sec. in standard mode, ADDR: 0x77 * [https://www.sparkfun.com/datasheets/Components/General/BST-BMP085-DS000-05.pdf BMP085]: 1.8~3.6V, 5µA at 1 sample / sec. in standard mode, ADDR: 0x77 * BME280, Addr: 0x76 (SDO Low) / 0x77 (SDO High) * MAX44009, Addr: 0x96/0x97 (A0 High), 0x94/0x95 (A0 Low) * GPS: 2.7 ~ 3.6V, BDS/GPS 双模连续运行:<23mA(@3.3V), 待机 <10uA(@3.3V) * SX1278: 1.8 ~ 3.7V (17dBm), 2.4 ~ 3.7V (20dBm) * EFM32ZG: 1.98 ~ 3.8V,deep sleep < 1uA * ATmega328p: 1.8 ~ 5.5V, deep sleep < 4.3uA * [http://wiki.jackslab.org/Power AP2112]: Max 6.5V input, Low Quiescent Current: 55μA (Typ.), Low Standby Current: 0.01μA (Typ.) <br><br>
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