{ "id": "heltec-v4", "name": "Heltec V4", "vendorId": "heltec", "kind": "dev-board", "category": "development-board", "lifecycle": "active", "familyId": "heltec-wifi-lora-32", "revision": "4.3", "aliases": [ "Heltec WiFi LoRa 32 V4", "Heltec WiFi LoRa 32 V4.2", "WiFi LoRa 32 V4", "WiFi LoRa 32 V4.2", "WiFi LoRa 32 V4.3.1" ], "replaces": "heltec-v3", "image": "heltec_v4.svg", "flasherListed": true, "product_url": "https://heltec.org/project/wifi-lora-32-v4/", "datasheet": "datasheet.pdf", "price": { "amount": 18, "currency": "USD", "asOf": "2026-06" }, "refs": { "mesh-sh-device": "heltec-wifi-lora-32-v4" }, "description": "ESP32-S3R2 + SX1262 successor to Heltec V3 with 16 MB flash, 2 MB PSRAM, and up to 28 dBm LoRa TX power. Same 0.96-inch OLED and largely V3-compatible pinout, plus solar input, optional GNSS header, and built-in 2.4 GHz FPC antenna. Native USB-C (no CP2102). Widely used for Meshtastic and MeshCore.", "roles": [ "companion", "repeater", "room-server", "standalone-ui" ], "transports": [ "ble", "usb", "wifi" ], "variants": [ { "name": "863~870MHz OLED / V4.2", "revision": "4.2", "bands": [ "868" ] }, { "name": "902~928MHz OLED / V4.2", "revision": "4.2", "bands": [ "915" ] }, { "name": "863~870MHz OLED / V4.3", "revision": "4.3", "sku": "ZC-310-1-CN", "bands": [ "868" ] }, { "name": "902~928MHz OLED / V4.3", "revision": "4.3", "sku": "ZC-310-1-CN2", "bands": [ "915" ] } ], "hardware": { "mcu": { "model": "esp32-s3", "flashMb": 16, "psramMb": 2, "ramKb": 2048 }, "radios": [ { "technology": "lora", "chip": "sx1262", "bands": [ "433", "470", "868", "915" ], "txPowerDbm": 28, "antenna": "IPEX-1.0" } ], "display": { "status": "present", "technology": "oled", "controller": "SSD1306", "size": 0.96, "resolution": { "width": 128, "height": 64 }, "colors": "monochrome" }, "gnss": { "status": "none" }, "leds": { "status": "present", "description": "White user LED" }, "power": { "batterySupported": true, "batteryBuiltIn": false, "batteryConnector": "SH1.25-2", "charging": true, "solarInput": true, "batteryChemistry": "li-po", "consumptionIdleMa": 20, "consumptionTxMa": 120 }, "expansion": [ { "type": "header-2.54", "count": 2, "pins": 18 }, { "type": "header-2.54", "count": 2, "pins": 2 }, { "type": "gnss-1.25-8", "count": 1, "pins": 8 } ], "enclosure": { "builtIn": false }, "physical": { "dimensionsMm": { "width": 51.7, "height": 25.4, "depth": 10.7 }, "weightG": 35 }, "environmental": { "operatingTempC": { "min": -20, "max": 70 } } }, "interfaces": { "usb": { "connector": "USB-C", "capabilities": [ "power", "serial", "flashing" ] }, "bluetooth": { "version": "5.0", "ble": true }, "wifi": { "status": "present", "standard": "802.11 b/g/n" } }, "prints": [ { "name": "H1+ - 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