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ESP32 WROOM MCU Module - 16MB (PCB Antenna)
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Price: $15.17
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Sparkfun Item #: WRL-17830 -

The ESP32-WROOM-32E is a powerful, generic Wi-Fi+BT+BLE MCU module that targets a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding. At the core of this module is the ESP32-D0WDQ6 chip. The chip embedded is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled, and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The user may also...

ESP32 WROOM MCU Module - 16MB (U.FL)
Price: $16.25
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Sparkfun Item #: WRL-17746 -

ESP32-WROOM-32 is a powerful, generic Wi-Fi+BT+BLE MCU module that targets a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding. At the core of this module is the ESP32-D0WDQ6 chip. The chip embedded is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled, and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The user may also power...

ESP32-C3 WROOM Module - 4MB (PCB Antenna)
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Price: $6.88
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Sparkfun Item #: WRL-18034 -

The Espressif ESP32-C3 is the next version of the popular ESP32 Bluetooth® and WiFi enabled module. This module features a single core, RISC-V-based processor with WiFi and Bluetooth LE 5.0 radios built into the SoC. The module features a PCB antenna and castellated plated pins for surface-mount soldering. This variation has 4 MB of on-board SPI flash and is the 85 °C temperature tolerant version. The 32-bit core RISC-V microcontroller features a maximum clock speed of 160 MHz. With 22...

LoRa Transceiver Module (RFM95CW)
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Price: $14.92
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Sparkfun Item #: COM-18085 -

RFM95CW is an ultra-low-power, high-performance LoRa transceiver for various frequency of 137-1020 MHz wireless applications. The high integration of RFM95C simplifies the peripheral materials needed in the system design. The sensitivity up to - 148 dBm which can optimize the link performance of applications. In addition, RFM95CW also supports Duty-Cycle operation mode, channel interception, high-precision RSSI, power-on reset, noise output and other more functions, which makes the application...

LoRa/FSK Transceiver Module - 915MHz (RFM97CW)
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Price: $14.92
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Sparkfun Item #: COM-18084 -

RFM97CW Sub-GHz radio transceivers are ideal for long range wireless applications. With high integration, the RFM97CW simplifies the peripheral materials needed in system design. The sensitivity up to - 138dbm that optimizes link performance for applications. In addition, the RFM97CW also supports the function of duty cycle operation mode, channel listening, high-precision RSSI, power on reset, squelch output, etc., which makes the application design more flexible and realizes product...

RFID Module - M6E-NANO
Price: $229.17
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Sparkfun Item #: SEN-16887 -

The M6E-Nano RFID Module delivers a small form factor embedded UHF RFID option with very low power consumption and is ideal for battery operated, low cost, small form-factor portable readers. The M6E-Nano’s wide RF output range (0 dBm to +27 dBm) is important for the read/write requirements for RFID-enabled printers and tag commissioning stations. This module features a surface mount package designed for the efficiency of SMT manufacturing, driving down the total cost for embedding RFID in...

Serial Flash Memory - GD25Q40CTIGR (4Mb, 120MHz)
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Price: $1.10
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Sparkfun Item #: COM-18076 -

The GD25Q40C (4M-bit) Serial flash supports the standard Serial Peripheral Interface (SPI), and supports the Dual/Quad SPI: Serial Clock, Chip Select, Serial Data I/O0 (SI), I/O1 (SO), I/O2 (WP#), and I/O3 (HOLD#). The Dual I/O data is transferred with speed of 240Mbits/s and the Quad I/O & Quad output data is transferred with speed of 480Mbits/s. Features: 4M-bit Serial Flash 512K-byte 256 bytes per programmable page Standard, Dual, Quad SPI High Speed Clock Frequency 120MHz for fast read...