# Big ESP32 + SX127x topic part 3 **URL:** \ **Category:** End Devices (Nodes)\ **Created:** [October 4, 2018, 12:58pm UTC](https://www.thethingsnetwork.org/forum/t/big-esp32-sx127x-topic-part-3/18436 "2018-10-04T12:58:13Z")\ **Posts on this page:** 1\ **Showing post:** 98
**Author:** ![bluejedi](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/bluejedi/32/44639_2.png) [@bluejedi](https://www.thethingsnetwork.org/forum/u/bluejedi)\ **Post date:** [January 17, 2019, 7:30pm UTC](https://www.thethingsnetwork.org/forum/t/big-esp32-sx127x-topic-part-3/18436/98 "2019-01-17T19:30:57Z")
There appears to be a new Heltec ESP32 LoRa board: ## Heltec Wireless Stick ![heltec%20wireless%20stick](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/7/9/79b506ab17f07ebd1c1cf6f511bc216a6c357c67.jpeg) New features (based on below specs / source): - Apparently 800uA power consumption in sleep mode. _(Disclaimer: this is my interpretation, formatting on page linked below is not clear about this.)_ A major improvement (while still 20+ times more than deep sleep current of ESP32) - 16 MB flash. - 0.49" OLED display. _Yes that’s tiny!_ This will probably have 64x32 resolution. - New Wifi Antenna design _(similar to TTGO Wifi LoRa32)_ (Finally an ESP32 LoRa board with a more properly placed Wifi antenna on top.) - ESP32, LoRa chip and display appear to be shielded with a metal cover (with cutout for display screen). Source: [https://www.aliexpress.com/item/Mini-ESP32-Wifi-Lora-Development-Board-with-0-49inch-oled-display-LoraBar/32960464571.html](https://www.aliexpress.com/item/Mini-ESP32-Wifi-Lora-Development-Board-with-0-49inch-oled-display-LoraBar/32960464571.html) * * * **Processor** Adopt Lexin’s ESP32 chip - 32-bit dual-core, 240MHz frequency - Integrated WiFi and Bluetooth - The main processor is completely free to run the user application. - An additional ULP coprocessor that monitors GPIOs, ADC channels, and controls most of the internal peripherals. **LoRa** Using Semtech’s SX1276 chip - Supports 433MHz, 470MHz, 868MHz, 915MHz quad-band optional Can be used as both a LoRa node and a micro gateway - Support LoRaWAN protocol Node transmission distance: up to 6KM in open space - Output power: up to +20dBm (±2dBm) **WiFi** - 802.11 b/g/n/e/i 802 802.11 n (2.4GHz), speed up to 150Mbps 802 802.11 e: QoS mechanism to implement wireless multimedia technology - WMM-PS, UAPSD - MPDU and A-MSDU frame aggregation technology Block reply, fragmentation and reorganization - Beacon automatic monitoring / scanning 802 802.11 i security features: pre-authentication and TSN - Support WPA / WPA2 / WPA2-Enterprise / WPS encryption - Infrastructure BSS Station Mode / SoftAP Mode - Wi-Fi Direct (P2P), P2P discovery, P2P GO mode and P2P power management - Support for IPv6 **Bluetooth** Bluetooth v4.2 full standard, including traditional Bluetooth (BR/EDR) and Bluetooth Low Energy (BLE) - Supports standard Class-1, Class-2 and Class-3 without external power amplifier - Enhanced precision power control - Output power up to +10 dBm - NZIF receiver with BLE reception sensitivity of -128 dBm Adaptive Frequency Hopping (AFH)Standard HCI based on SDIO / SPI / UART interface High speed UART HCI up to 4 Mbps - Support BT 4.2 controller and host protocol stack - Service Discovery Protocol (SDP) Universal Access Application (GAP) - Security Management Protocol (SMP) - Low power Bluetooth ATT ATT / GATT - HID - Supports all GATT-based Bluetooth low energy applications - SPP-Like Low-Power Bluetooth Data Transmission Protocol BLE BLE Beacon - A2DP / AVRCP / SPP, HSP / HFP, RFCOMM - CVSD and SBC audio codec algorithms Bluetooth piconet (Piconet) and scatternet (Scatternet) **Human interaction** - 0.49 inch OLED screen - button (reset and program) **power supply** - Input power: USB, lithium battery - Output power: +5V (only when USB is powered), +3.3V Integrated lithium battery charging circuit - External power supply controlled by IO port to facilitate development board to enter low power consumption **interface** - UART UART, SPI, I2C, I2S, Mirco SD card - 12 - bits ADC, 8 - bits DAC - 29 general GPIO ports **storage** - FLASH: 64Mb (16MB) **Power consumption** - Sleep current: 800uA **Mechanical structure** - Size: 60mmX23mmX8mm --- _[View the full topic](https://www.thethingsnetwork.org/forum/t/big-esp32-sx127x-topic-part-3/18436)._