{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ESP32-S2-SOLO-2-N4","brand":"Espressif Systems","brandSlug":"espressif","productSlug":"ESP32-S2-SOLO-2-N4","canonicalUrl":"https://icboms.com/espressif/ESP32-S2-SOLO-2-N4","factsUrl":"https://icboms.com/api/mcp/products/ESP32-S2-SOLO-2-N4","rawCanonicalId":null},"summary":{"shortDescription":"Espressif Systems ESP32-S2 series, WiFi module, 802.11b/g/n, 150 Mbps, 2.4 GHz, 4 MB flash, PCB trace antenna, 41-SMD module.","salesMarkdown":"## Wireless link budget and what it means for range The ESP32-S2-SOLO-2-N4: Transmit power is 19.5 dBm — that is a strong output stage for a 2.4 GHz module, giving roughly 2–3 dB more link margin than the typical 17 dBm ESP32 variants. Combined with -97 dBm receiver sensitivity, the total link budget sits around 116.5 dB, enough for reliable 150-meter line-of-sight range in open air with the on-board PCB trace antenna. No external antenna matching or certification headache — the antenna is integrated and pre-tuned. ## Memory map and application sizing 4 MB flash is the N4 variant's distinguishing feature — enough for a full TLS 1.3 stack, OTA update partition, and a moderate application binary. The 336 kB on-chip SRAM plus 128 kB ROM leaves about 200 kB free for heap after the RTOS and WiFi stack overhead. If your application needs more than 4 MB flash for assets or logging, step up to the N8 or N16 flash variants in the same ESP32-S2 family. ## Interface set and sensor integration The module exposes USB, SPI, I2C, I2S, UART, ADC, GPIO, and PWM — enough to hang a temperature/humidity sensor on I2C, a SPI flash for data logging, and drive a PWM fan or LED without an external IO expander. The 41-SMD module has a 0.8 mm pitch castellated edge — route the antenna keep-out zone per Espressif's layout guide; the PCB trace antenna needs a ground plane cutout underneath the module edge. ## Supply rails and thermal budget Current draw in receive mode is 71–75 mA; transmit current ramps to 165–310 mA depending on output power setting.","metaTitle":"ESP32-S2-SOLO-2-N4 WiFi Module, 802.11b/g/n, 150 Mbps","metaDescription":"Espressif Systems ESP32-S2-SOLO-2-N4 WiFi module. 802.11b/g/n, 150 Mbps, 4 MB flash, PCB trace antenna. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF & Wireless ICs"],"specifications":{"Mfr":"Espressif Systems","Series":"ESP32-S2","Protocol":"802.11b/g/n","Data Rate":"150Mbps","Frequency":"2.4GHz","Packaging":"Cut Tape (CT) Bulk","Modulation":"-","Memory Size":"4MB Flash, 128kB ROM, 336kB SRAM","Part Status":"Active","Sensitivity":"-97dBm","Antenna Type":"PCB Trace","Mounting Type":"Surface Mount","Package / Case":"41-SMD Module","Power - Output":"19.5dBm","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-S2","Base Product Number":"ESP32-S2","Current - Receiving":"71mA ~ 75mA","Operating Temperature":"-40°C ~ 85°C (TA)","Current - Transmitting":"165mA ~ 310mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.4000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1205b7559a07e9491cfa4939842c5aa0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative in the ESP32-S2 family?","answer":"The ESP32-S2-SOLO-2-N8 (8 MB flash) and ESP32-S2-SOLO-2-N16 (16 MB flash) are pin-compatible drop-in replacements — same 41-SMD package, same PCB trace antenna, same 802.11b/g/n radio. The only difference is flash density, so a BOM swap requires no board layout change. No second-source from another manufacturer exists; the ESP32-S2 is Espressif-proprietary."},{"question":"What compliance documentation does Espressif provide for this module?","answer":"Espressif provides FCC/CE/IC modular certification for the ESP32-S2-SOLO-2 series, plus a RoHS and REACH declaration. The module carries an FCC ID and IC number printed on the shield — no additional end-product testing is required for the radio if the host device follows the integration guidelines in Espressif's certification report. UL listing is not standard for this module class."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/espressif/ESP32-S2-SOLO-2-N4","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-2-N4 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}}