1.0 Overview 2.0 Features

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3V3 Ultra–Low–Noiseswitching regulatorLoRa / SigfoxtransceiverESP32 Dual CoreMicrocontroller andWiFi/Bluetooth 4.2 radio8MBflashmemoryLoRa / Sigfox868–915 MHz antennaInternal WiFiand BluetoothAntennaWS2812 RGBmulti–colour LEDRF switchLoRa 433–510 MHzantenna connectorSize55mm x 20mm x 3.5mm1.0U.FL connectorReset switchOperating temperature:–40 to 85 degrees celsiusOverview The LoPy4 is a quadruple bearer MicroPythonenabled development board (LoRa, Sigfox, WiFi,Bluetooth) – perfect enterprise grade IoT platformfor your connected Things. With the latest Espressifchipset the LoPy4 offers a perfect combination ofpower, friendliness and flexibility. Create and connectyour things everywhere. ��Powerful CPU, BLE and state of the art WiFi radio.Simultaneous LoRa and Sigfox connectivityCan also double up as a Nano LoRa gatewayMicroPython enabledFits in a standard breadboard (with headers)Ultra–low power usage: a fraction compared to otherconnected micro controllers–– Available with or without pin headers soldered on01

3.0Specifications3.1CPU–– Xtensa dual–core 32–bit LX6 microprocessor(s), upto 600 DMIPS–– Hardware floating point acceleration–– Python multi–threading–– An extra ULP–coprocessor that can monitor GPIOs,the ADC channels and control most of the internalperipherals during deep–sleep mode while onlyconsuming 25uA.3.2Memory–– RAM: 520KB 4MB–– External flash: 8MB3.3WiFi–– 802.11b/g/n 16mbps4.0Block Diagram3.4Bluetooth–– Low energy and classic3.5RTC–– Running at 150kHz3.6Security–– SSL/TLS support–– WPA Enterprise security3.7Hash / encryption–– SHA–– MD5–– DES–– AESFigure 1 – System block diagram02

DDATA2SDDATA3Touch4Touch5Touch2Touch7Touch3Safe boot, the factory firmware is selected7-9 sec3627VSPIIDU2TXDGPIO18EMACCO180GPIO23Internal FunctionsHS1DATA5HS1STROBE23/01/18To order contact sales@pycom.ioand certain other noncommercial uses permitted by copyrightlaw.LoRa / Sigfox InterruptLoRa / Sigfox SelectP23P22P21P20P19P18P17P16P15P14P13Connect to a 10nF capacitor toenable Touch Pin functionHack your LoPy4Vin (3.5-5.5V)GND3V3 ! Up to 1.2-A Maximum Load Capability. Output ONLY.MTMSHSPICLK SDCLKHS2CLK17 GPIO14 EMACTXD2 ADC2 6 RTCIO16 Touch614 GPIO25 EMACRXD0 ADC2 8 RTCIO6DAC 1DAC 215 GPIO26 EMACRXD1 ADC2 9 RTCIO713 GPIO33ADC1 5 RTCIO8 Touch8 XTAL3212GPIO32ADC1 4 RTCIO9 Touch9 XTAL3210 GPIO34ADC1 6 RTCIO4VDET1Only Input pins!11 GPIO35ADC1 7 RTCIO5VDET2No pullup/pulldown !8ADCPAGPIO39ADC1 3 RTCIO3SensVNinternal resistance7GPIO38ADC1 2 RTCIO2SensCN6MISOGPIO37ADC1 1 RTCIO1SensCP5GPIO36ADCPAADC1 0 RTCIO0SensVPdocument may be reproduced, distributed, or transmitted in any formor by any means, including photocopying, recording, or other electronicor mechanical methods, without the prior written permission of PycomLtd, except in the case of brief quotations embodied in critical reviewsSafe boot, previous user update selected4-6 secDistributed and manufactured by Pycom Ltd.Registered office:High Point, 9 Sydenham Road, Guildford, Surrey GU1 3RX, UKCopyright 2017 by Pycom Ltd. All rights reserved. No part of thisSafe boot, latest firmware is selected1-3 secModel: LoPy4 3V3EMACTXENEMACTXD1EMACRXEREMACTXD3IC: 22263-LOPY4RP12EMACRXCLKEMACTXD0EMACRXDVFCC ID: 2AJMTLOPY4RBoot modes and safe boot GNDLow Level BootloaderP2ADC2 7U0CTSRTCIO12 ADC2 2RTCIO15 ADC2 5RTCIO14 ADC2 4U0RTSRTCIO17940412324213416382218203942WiFi / Bluetooth External Antenna 9GPIO2GPIO12GPIO13GPIO22GPIO21LoRa SigfoxPowerGNDSerial PinAnalog PinControlPhysical PinPort PinTouch PinDAC PinPMW PinRTCIO11ADC2 1 EMACTXCLKADC2 0 EMACTXERRTCIO13 ADC2 3 XDCLKOUT2(868/915 MHz) LoRa / Sigfox antenna portWS2812 LEDAbsolute MAX per pin 12mArecommended 6mAWiFi BluetoothWiFi external / internalantenna selection control pinRX0TX0RSTP0P1P2 RGB LEDTX1P3 HS2DATA1RX1P4HS2CMDCLKHS1DATA6!MOSIConnected toLoRa / SigfoxMISOmoduleP8SDAP9 HS2DATA2CLK SCL P10 HS2DATA3MOSIP11P12PROGRAMPortLoRa (433 MHz) AntennaReset Button!Pinout diagram5.0PinoutFigure 2 – Module pinout diagramNote: The ESP32 supports remapping its peripherals to alternative pins. See below for a detailed list.03

6.0Pin DetailsTable 1 – Module pinoutModulePinESP32GPIOPinName1––ResetActive Low, connected to on–boardbutton23P0RX0(Programming)Used by the bootloader and to programthe module31P1TX0(Programming)Used by the bootloader and to programthe module40P254P3TX12*615P4RX12*75–LoRa/Sigfox radioSPI CLK827–LoRa/Sigfox radioSPI MOSI919–LoRa/Sigfox radioSPI MISO102P81112P9121313Default FunctionADC2*PWMRTC†NotesIf tied to GND during boot the device willenter bootloader mode, Connected to theon–board RGB LEDJTAG TDO, SD card CMDNot recommended for external use2*Not recommended for external useNot recommended for external use2*SD card DAT0SDA2*JTAG TDIP10SCL (I2C) / CLK(SPI)2*JTAG TCK22P11MOSI1421P121536P131637P14173818If tied to 3.3V during boot the deviceenters safe boot mode, JTAG MISO1Input only1Input onlyP151Input only39P161Input only1935P171Input only2034P181Input onlyMISO04

6.0Pin DetailsTable 1 – Module 6P212*DAC,2425P222*DAC2514P232*JTAG TMS, SD card SCLK26––Regulated 3.3Vsupply27––Ground28––Voltage Input–18–LoRa reset–16–External WiFi/BT antenna switch, Low on–board, High U.FL–23–LoRa/Sigfox radio interrupt–17–LoRa/Sigfox radio chip selectDefault FunctionADCPWMRTC†NotesOutput only, do not feed 3.3V into this pinor you can damage the regulatorAccepts a voltage between 3.5V and 5.5V† The pins on the RTC power domain can be used during deep sleep, specifically GPIO pins will maintain their state while in deep sleep.* ADC2 is currently not supported in the micropython firmware6.1Remapping Pins The ESP32 features comprehensive pin remappingfunctionality. This allows peripherals to be mappedonto almost any available GPIO pins. The above tablemerely shows the default assignments. For example, thedefault mapping has the SPI and I2C clocks overlapping,meaning both cannot be used simultaneously withoutremapping one to a different pin. For a detailed guide ofwhat peripheral can be assigned to what pins please read“Appendix A – ESP32 Pin Lists” of the ESP32 datasheet.05

7.0ESP32 PeripheralsTable 2 – PeripheralsPeripheralCountPinsUART3Remappable to any GPIO.Note: P13–18 can only be mapped to RX or CTS since they are input only.I2C2Remappable to any GPIO except P13–18 since they are input only and I2C is bi–directional.SPI3Remappable to any GPIO.Note: P13–18 can only be mapped to MISO since they are input only.CAN*1Remappable to any GPIO.Note: P13–18 can only be mapped to RX since they are input only.JTAG1TDO P4, TDI P9, TCK P10, TMS P24PWM1All GPIO except P13–18 which are input onlyADC18Fixed mapping, see Table 1, Only ADC 1 is supported in our micropython firmware.DAC2Only available on P21 and P22SD1DAT0 P8, SCLK P23, CMD P4* Requires an external CAN bus transceiver, we recommend the SN65HVD230 from Texas Instruments. For a more detailed description of the ESP32 peripheralsalong with peripherals not currently supported by ourfirmware, please check the ESP32 datasheet.7.1RTC Our modules by default all use the internal RC oscillatorat 150kHz for the RTC. If you require better accuracy/stability you can connect a 32.768 kHz crystal (or TCXO)externally on pins P19 and P20 (or P19 for a TXCO)Figure 3 – External RTC crystal circuits06

8.0Programming the device8.1UART By default, the modules run an interactive python REPLon UART0 which is connected to P0 (RX) and P1 (TX)running at 115200 baud. The easiest way to connect tothe LoPy4 is via our expansion board, but any USB UARTadapter will suffice. Code can be run via this interactiveREPL or you can use our PyMakr plugin for Atom or VisualStudio Code to upload code to the board.8.2Wi–FiBy default, the LoPy4 also acts as a Wi–Fi access point.SSID: lopy4–wlan–XXXXPassword: www.pycom.io Once connected to the LoPy4’s Wi–Fi network you canaccess it in two ways.9.08.2.1 Telnet Running on port 23 is a telnet server. This acts in avery similar way to the UART. It presents you with aninteractive REPL and can also be used to upload code viaPyMakr.8.2.2 FTP The LoPy4 also runs a FTP server that allows you to copyfiles to and from the device, include an SD card if one isconnected. To connect to this FTP server, you need to useplain FTP (un–encrypted) with the following credentials: User: microPassword: pythonBoot modes9.1Bootloader mode In order to update the firmware of the LoPy4 device, itneeds to be placed into bootloader mode. In order todo this, P2 needs to be connected to ground when thedevice reboots. Once in bootloader mode you can usethe Pycom firmware update tool to update to the latestofficial firmware. If you are developing your own firmwarebased on our open–source firmware, a flashing script isprovided with the source code.9.2Safe boot The micropython firmware features a safe boot featurethat skips the boot.py and main.py scripts and goesstraight to the REPL. This is useful if the device isprogrammed with code that causes the device to crash orbecome inaccessible. To access this mode, you need toconnect P12 to 3.3V and reset the device. Upon enteringsafe boot mode, the on–board LED will begin to blinkorange. Depending on the duration the pin is held at 3.3V,a different firmware will be run.Table 3 – Boot modes0–3 Seconds3–6 SecondsCurrent firmware without runningboot.py or main.pyPrevious firmware if the firmware was uploaded via OTA(without running boot.py and main.py)07

10.0Power he LoPy4 features an on–board voltage regulator thatTtakes 3.5V – 5.5V from the VIN pin and regulates it to3.3V. It is important to only use the 3.3V as an output and10.1not try to feed 3.3V into this pin as this could damage theregulator.Current consumption by power modes/features measured at 5VTable 4 – Power consumption by featureModeMinAvg.MaxUnitsIdle (no radios)–35.4–mALoRa Transmit†–108–mAWiFi AP–104–mAWiFi client–99.0–mABluetooth–97.5–mADeep sleep–18.5–μA* More details can be found in section 14.208

11.0Memory Map11.1FlashTable 5 – Flash memory mapNameDescriptionStart addressSizeNVSNon–volatile RAM area. Used by the NVS API0x90000x7000Firmware Slot 0First firmware slot. Factory firmware is flashed here0x100000x180000OTA infoInformation about the current active firmware0x1900000x1000Firmware Slot 1Second firmware slot0x1A00000x180000File system504KB file system on devices with 4MB flash0x3800000x7F000ConfigConfig area for LoRa, Sigfox and LTE0x3FF0000x100011.2RAMTable 6 – RAM memory mapNameDescriptionOn–chip SRAMInternal RAM memory used by the 2 xtensa CPUsFast RTC RAMFast RAM area accessible by the xtensa cores duringboot and sleep modes8KBSlow RTC RAMSlow RAM area accessible by the Ultra–Low PowerCoprocessor during deep sleep8KBExternal pSRAMExternal QSPI RAM memory clocked @ 40MHz4MBNameDescriptionSizeOn–chip ROMContains core functions and boot code.eFuse256 bits are used for the system (MAC address andchip configuration) and the remaining 768 bits arereserved for customer applications, including Flash–Encryption and Chip–ID11.3Size520KBROM and eFusesTable 7 – Miscellaneous memory448KB1kbit09

12.0WiFi12.1Supported features–– 802.11 b/g/n/e/i–– 802.11 n (2.4 GHz), up to 150 Mbps–– 802.11 e: QoS for wireless multimedia technology–– WMM–PS, UAPSD–– A–MPDU and A–MSDU aggregation–– Block ACK–– Fragmentation and defragmentation12.2–– Automatic Beacon monitoring/scanning–– 802.11 i security features: pre–authentication and TSN–– Wi–Fi Protected Access (WPA)/WPA2/WPA2–Enterprise/Wi–Fi Protected Setup (WPS)–– Infrastructure BSS Station mode/SoftAP mode–– Wi–Fi Direct (P2P), P2P Discovery, P2P Group Ownermode and P2P Power ManagementSpecificationsTable 8 – WiFi specificationsDescriptionMinTyp.MaxUnitInput Frequency2412–2484MHz131415dBm19.52020.5dBmTx power Output power of PA for 72.2MbpsOutput power of PA for 11b modeSensitivityDSSS, 1Mbps––98dBmCCK, 11 Mbps––91dBmOFDM, 6 Mbps––93dBmOFDM, 54 Mbps––75dBmHT20, MCS0––93dBmHT20, MCS7––73dBmHT40, MCS0––90dBmHT40, MCS7––70dBmMCS32––89dBmAdjacent channel rejectionOFDM, 6 Mbps–37–dBOFDM, 54 Mbps–21–dBHT20, MCS0–37–dBHT20, MCS7–20–dB10

13.0Bluetooth13.1Supported features–– Compliant with Bluetooth v4.2 BR/EDR and BLEspecification–– Class–1, class–2 and class–3 transmitter withoutexternal power amplifier–– Enhanced power control–– 12 dBm transmitting power–– NZIF receiver with –97 dBm sensitivity–– Adaptive Frequency Hopping (AFH)–– Standard HCI based on SDIO/SPI/UART–– High–speed UART HCI, up to 4 Mbps–– BT 4.2 controller and host �––––––––Service Discover Protocol (SDP)General Access Profile (GAP)Security Manage Protocol (SMP)ATT/GATTHIDAll GATT–based profile supportedSPP–like GATT–based profileBLE BeaconA2DP/AVRCP/SPP, HSP/HFP, RFCOMMCVSD and SBC for audio codecBluetooth Piconet and ScatternetSpecification13.2.1 Receiver – Basic Data RateTable 9 – Receiver (basic data rate) specificationsParameterMinTyp.MaxUnitSensitivity @0.1% BER––94–dBmMaximum received signal @0.1% BER0––dBmCo–channel C/I– 7–dBF F0 1 MHz–––6dBF F0 – 1 MHz–––6dBF F0 2 MHz–––25dBF F0 – 2 MHz–––33dBF F0 3 MHz–––25dBF F0 – 3 MHz–––45dB30Mhz 2000MHz–10––dBm2000MHz 2400MHz–27––dBm2500MHz 3000MHz–27––dBm3000MHz 12.5GHz–10––dBm–36––dBmAdjacent channel selectivity C/IOut–of–band blocking performanceIntermodulation11

13.2.2 Receiver – Enhanced Data RateTable 10 – Receiver (basic data rate) specificationsParameterMinTyp.MaxUnitπ/4 DQPSKSensitivity @0.1% BER––90–dBmMaximum received signal @0.1% BER–0–dBmCo–channel C/I–11–dBF F0 1 MHz––7–dBF F0 – 1 MHz––7–dBF F0 2 MHz––25–dBF F0 – 2 MHz––35–dBF F0 3 MHz––25–dBF F0 – 3 MHz––45–dBAdjacent channel selectivity C/I8DPSKSensitivity @0.1% BER––84–dBmMaximum received signal @0.1% BER––5–dBmC/I c–channel–18–dBF F0 1 MHz–2–dBF F0 – 1 MHz–2–dBF F0 2 MHz––25–dBF F0 – 2 MHz––25–dBF F0 3 MHz––25–dBF F0 – 3 MHz––38–dBAdjacent channel selectivity C/I12

13.2.3 Receiver – Bluetooth LETable 11 – Receiver (BLE) specificationsParameterMinTyp.MaxUnitSensitivity @30.8% PER––97–dBmMaximum received signal @30.8% PER0––dBmCo–channel C/I– 10–dBF F0 1MHz––5–dBF F0 – 1MHz––5–dBF F0 2MHz––25–dBF F0 – 2MHz––35–dBF F0 3MHz––35–dBF F0 – 3MHz––45–dB30MHz 2000MHz–10––dB2000MHz 2400MHz–27––dBm2500MHz 3000MHz–27––dBm3000MHz 12.5GHZ–10––dBm–36––dBmAdjacent channel selectivity C/IOut–of–band blocking performanceIntermodulation13

13.2.4 Transmitter – Basic Data RateTable 12 – Transmitter (basic data rate) specificationsParameterMinTyp.MaxUnitRF transmit power–0–dBmGain control step– 3–dBm–12– 12dBm–0.9–MHzF F0 1 MHz––24–dBmF F0 – 1 MHz––16.1–dBmF F0 2 MHz––40.8–dBmF F0 – 2 MHz––35.6–dBmF F0 3 MHz––45.7–dBmF F0 – 3 MHz––40.2–dBmF F0 3 MHz–45.6–dBmF F0 – 3 MHz–44.6–dBmΔf1avg––155KHzΔf2 max133.7RF power control range 20 dB bandwidthAdjacent channel transmit powerKHzΔf2 avg /Δf1avg–0.92––ICFT––7–KHzDrift rate–0.7–KHz/50μsDrift (1 slot packet)–6–KHzDrift (5 slot packet)–6–KHz14

13.2.5 Transmitter – Enhanced Data RateTable 13 – Transmitter (enhanced data rate) specificationsParameterMinTyp.MaxUnitRF transmit power–0–dBmGain control step– 3–dBm–12– 12dBmπ/4 DQPSK max w0––0.72–KHzπ/4 DQPSK max wi––6–KHzπ/4 DQPSK max wi w0 ––7.42–KHz8DPSK max w0–0.7–KHz8DPSK max wi––9.6–KHzRF power control range8DPSK max wi w0 π/4 DQPSK modulation accuracy8 DPSK modulation accuracyIn–band spurious emissionsEDR differential phase coding–10KHzRMS DEVM–4.28–%99% DEVM––30%Peak DEVM–13.3–%RMS DEVM–5.8–%99% DEVM–20%Peak DEVM–14–%F F0 1MHz––34–dBmF F0 – 1MHz––40.2–dBmF F0 2MHz––34–dBmF F0 – 2MHz––36–dBmF F0 3MHz––38–dBmF F0 – 3MHz––40.3–dBmF F0 3MHz–––41.5dBm–100–%15

13.2.6 Transmitter – Bluetooth LETable 14 – Transmitter (BLE) specificationsParameterMinTyp.MaxUnitRF transmit power–0–dBmGain control step– 3–dBm–12– 12dBmF F0 1MHz––14.6–dBmF F0 – 1MHz––12.7–dBmF F0 2MHz––44.3–dBmF F0 – 2MHz––38.7–dBmF F0 3MHz––49.2–dBmF F0 – 3MHz––44.7–dBmF F0 3MHz––50–dBmF F0 – 3MHz––50–dBmΔf1avg––265KHzΔf2 max247––KHzΔf2 avg /Δf1avg––0.92––ICFT––10–KHzDrift rate–0.7–KHz/50μsDrift–2–KHzRF power control rangeAdjacent channel transmit power14.0LoRa14.1Supported featuresTable 15 – Supported LoRa featuresPart NumberSemtech SX1276Frequency Range137–1020MHzLoRa Sensitivity6 – 127.8 – 500kHz0.018 – 37.5kpbs–111 to –148dBmThe current micropython firmware supports LoRaWAN 1.0 acting as either a Class A or Class C node.16

14.2SpecificationsTable 16 – LoRa electrical characteristicsSymbolIDDR LDescriptionSupply current in receiverLoRa mode, LNABoost OffConditionsMinTyp.MaxUnitBands 2&3 BW 7.8–62.5kHz–11.0–mABands 2&3 BW 125kHz–11.5–mABands 2&3 BW 250KHz–12.4–mABands 2&3 BW 500KHz–13.8–mABands 1 BW 7.8–62.5kHzIDDT LIDDT H LBI LSupply current in transmittermodeSupply current in transmittermode with an externalimpedance transformerBlocking Immunity,FRF 868MHz CW interfererIIP2 L2nd order Input InterceptPoint Unwanted tones are 20MHz above the LOIIP3 L HF3rd order Input Intercept pointUnwanted tones are 1MHz and1.995 MHz above the LOIIP3 L LF3rd order Input Intercept pointUnwanted tones are 1MHz and1.995 MHz above the LO9.9mABands 1 BW 125KHz–10.3–mABands 1 BW 250KHz–11.1–mABands 1 BW 500KHz–12.6–mARFOP 13dBm–28–mARFOP 7dBm–20–mA–90–mAOffset 1 MHz–89–dBOffset 2 MHz–94–dBOffset 10 MHz–100–dBHighest LNA gain– ��–15–dBmUsing PA BOOST pinRFOP 17 dBmBand 1Highest LNA gain G1LNA gain G2, 5dB sensitivity hitBand 2Highest LNA gain G1LNA gain G2, 2.5dB sensitivity hit17

14.2SpecificationsTable 16 – LoRa electrical characteristicsSymbolDescriptionRFS L10 HFRF sensitivity, Long–RangeMode, highest LNA gain,LNA Boost for Band 1, usingsplit RX/TX pat, 10.4 kHzbandwidthRFS L62 HFMinTyp.MaxUnitSF 6––131–dBmSF 7––134–dBmSF 8––138–dBmSF 11––146–dBmSF 6––121–dBmSF 7––126–dBmSF 8––129–dBmSF 9––132–dBmSF 10––135–dBmSF 11––137–dBmSF 12––139–dBmSF 6––118–dBmSF 7––123–dBmSF 8––126–dBmSF 9––129–dBmSF 10––132–dBmSF 11––133–dBmSF 12––136–dBmSF 6––115–dBmSF 7––120–dBmRF sensitivity, Long–RangeMode,SF 8––123–dBmhighest LNA gain, LNA Boostfor Band 1, using split RX/TXpat, 250 kHz bandwidthSF 9––125–dBmSF 10––128–dBmSF 11––130–dBmSF 12––133–dBmRF sensitivity, Long–RangeMode, highest LNA gain,LNA Boost for Band 1, usingsplit RX/TX pat, 62.5 kHzbandwidthRF sensitivity, Long–RangeMode,RFS L125HFRFS L250HFhighest LNA gain, LNA Boostfor Band 1, using split RX/TXpat, 125 kHz bandwidthConditions18

14.2SpecificationsTable 16 – LoRa electrical characteristicsSymbolRFS L500HFRFS L7.8 LFRFS L10 LFRFS L62 LFDescriptionMinTyp.MaxUnitSF 6––111–dBmSF 7––116–dBmRF sensitivity, Long–RangeMode,SF 8––119–dBmhighest LNA gain, LNA Boostfor Band 1, using split RX/TXpat, 500 kHz bandwidthSF 9––122–dBmSF 10––125–dBmSF 11––128–dBmSF 12––130–dBmSF 11––145–dBmSF 12––148–dBmRF sensitivity, Long–RangeMode, highest LNA gain, Band2 or 3, using split RX/TX path7.8 kHz bandwidthConditionsRF sensitivity, Long–RangeMode, highest LNA gain, Band2 or 3, using split RX/TX pathSF 6––132–dBmSF 7––136–dBm10.4 kHz bandwidthSF 8––138–dBmSF 6––123–dBmSF 7––128–dBmSF 8––131–dBmSF 9––134–dBmSF 10––135–dBmSF 11––137–dBmSF 12––140–dBmRF sensitivity, Long–RangeMode, highest LNA gain, Band2 or 3, using split RX/TX path62.5 kHz bandwidth19

14.2SpecificationsTable 16 – LoRa electrical characteristicsSymbolRFS L125 LFRFS L500LFDescriptionRF sensitivity, Long–RangeMode, highest LNA gain, Band2 or 3, using split RX/TX path125 kHz bandwidthRF sensitivity, Long–RangeMode, highest LNA gain, Band2 or 3, using split

7.0 ESP32 Peripherals Table 2 – Peripherals * Requires an external CAN bus transceiver, we recommend the SN65HVD230 from Texas Instruments. Figure 3 – External RTC crystal circuits For a more detailed description of the ESP32 peripherals along with peripherals not currently supported by our firmware, p

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