{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ESP32-S2-SOLO-2U-N4R2","brand":"Espressif Systems","brandSlug":"espressif","productSlug":"ESP32-S2-SOLO-2U-N4R2","canonicalUrl":"https://icboms.com/espressif/ESP32-S2-SOLO-2U-N4R2","factsUrl":"https://icboms.com/api/mcp/products/ESP32-S2-SOLO-2U-N4R2","rawCanonicalId":null},"summary":{"shortDescription":"Espressif Systems ESP32-S2 series WiFi module, ESP32-S2-SOLO-2U-N4R2, 2.4GHz 802.11b/g/n, 150Mbps, 4MB Flash + 2MB PSRAM, 19.5dBm output, 41-SMD module.","salesMarkdown":"## 41-pin SMD module with integrated memory The ESP32-S2-SOLO-2U-N4R2 is a surface-mount WiFi module from the ESP32-S2 series, packing the ESP32-S2R2 IC with 4MB of flash and 2MB of PSRAM in a 41-SMD Module package. The on-module memory stack means the design-in avoids external SPI flash or PSRAM routing — the 336kB of internal SRAM plus the 2MB PSRAM gives the application heap room for TLS stacks or larger frame buffers without adding a second memory die to the BOM. ## WiFi link budget and power profile This module supports 802.11b/g/n on 2.4GHz with a data rate ceiling of 150Mbps. The 19.5dBm transmit output power provides a strong link budget for industrial environments where signal must punch through metal enclosures or concrete walls — at this power level the module can maintain a connection at longer range than lower-power WiFi parts, though the current draw during transmission ranges from 165mA to 310mA depending on the output level and data rate selected. Receive sensitivity is -97dBm, which sets the noise floor for the link. In a clean RF environment this gives roughly 15-20 dB of margin above the noise floor at moderate range; in a noisy factory floor the co-channel interference will erode that margin, so the antenna placement and the board-level RF layout matter more than the bare sensitivity number. The receive current draw is 71mA to 75mA, which is low enough that a battery-powered sensor node spending most of its time in receive mode can still achieve months of operation on a 2000mAh cell, provided the duty cycle is managed in firmware. ## Industrial temperature and peripheral set The supply voltage range is 3V to 3.6V, which aligns with standard 3.3V rails; a 3.3V LDO with at least 500mA output capacity is recommended to cover the peak transmit current plus the module's own draw. The serial interface set includes ADC, GPIO, I²C, I²S, SPI, PWM, UART, and USB — enough to connect most common sensors, displays, and actuators without an external microcontroller. The USB interface is particularly useful for firmware bring-up: the module can enumerate as a USB CDC device for serial console access during development, eliminating the need for a separate UART-to-USB bridge on the debug header.","metaTitle":"ESP32-S2-SOLO-2U-N4R2 Espressif WiFi Module, 2.4GHz 150Mbps","metaDescription":"Active Espressif ESP32-S2-SOLO-2U-N4R2 WiFi module with 4MB Flash, 2MB PSRAM, 2.4GHz 802.11b/g/n, 19.5dBm output. Industrial temp -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF & Wireless ICs"],"specifications":{"Mfr":"Espressif Systems","Series":"ESP32-S2","Package":"Cut Tape (CT); Bulk","Protocol":"802.11b/g/n","Data Rate":"150Mbps","Frequency":"2.4GHz","Modulation":"-","Memory Size":"4MB Flash, 2MB PSRAM, 128kB ROM, 336kB SRAM","Sensitivity":"-97dBm","Antenna Type":"Antenna Not Included","Mounting Type":"Surface Mount","Package / Case":"41-SMD Module","Power - Output":"19.5dBm","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Serial Interfaces":"ADC, GPIO, I²C, I²S, SPI, PWM, UART, USB","RF Family/Standard":"WiFi","Utilized IC / Part":"ESP32-S2R2","Current - Receiving":"71mA ~ 75mA","Operating Temperature":"-40°C~85°C(TA)","Current - Transmitting":"165mA ~ 310mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.0400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1205b7559a07e9491cfa4939842c5aa0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy ESP32-S2-SOLO-2U-N4R2 and get a price?","answer":"This module is sourced to order against an RFQ through our independent distribution network."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/espressif/ESP32-S2-SOLO-2U-N4R2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/espressif/ESP32-S2-SOLO-2U-N4R2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}