====== LoRa Transceivers / Modules ======

===== SX1276 =====

I think the LILYGO T-Beam I have uses this chip but I've not checked. It's not specified in the ailexpress listing.

https://www.semtech.com/products/wireless-rf/lora-connect/sx1276
SX1276/77/78/79

Specs from Semtec:

"Using Semtech’s patented LoRa modulation technique SX1276/77/78/79 can achieve a sensitivity of over -148dBm using a low cost crystal and bill of materials. The high sensitivity combined with the integrated +20dBm power amplifier"

    168dB maximum link budget
    +20dBm - 100mW constant RF output vs. V supply
    +14dBm high efficiency PA
    Programmable bit rate up to 300kbps
    High sensitivity: down to -148dBm
    Bullet-proof front end: IIP3 = -11dBm
    Excellent blocking immunity
    Low RX current of 9.9mA, 200nA register retention
    Fully integrated synthesizer with a resolution of 61Hz
    FSK, GFSK, MSK, GMSK, LoRa and OOK modulation
    Built-in bit synchronizer for clock recovery
    Preamble detection
    127dB Dynamic Range RSSI
    Automatic RF Sense and CAD with ultra-fast AFC
    Packet engine up to 256 bytes with CRC
    Built-in temperature sensor and low battery indicator

{{ :ds_sx1276-7-8-9_w_app_v7.pdf |SX1276 Datasheet}}

===== SX1262 =====

"Better" than SX1276, according to comments on the internet / meshtastic people.

Used in most boards I have: Heltec, Waveshare Pi Pico module, but maybe not the LILYGO T-Beam, which is probably the SX1276.

Semtec specs:
    LoRa and FSK Modem
    170dB maximum link budget (SX1262 / 68)
    +22dBm or +15dBm high efficiency PA
    Low RX current of 4.6mA
    Integrated DC-DC converter and LDO
    Programmable bit rate up to 62.5kbps LoRa and 300kbps FSK
    High sensitivity: down to -148dBm
    88dB blocking immunity at 1MHz offset
    Co-channel rejection of 19dB in LoRa mode
    FSK, GFSK, MSK, GMSK, LoRa and Long Range FHSS modulations
    Built-in bit synchronizer for clock recovery
    Automatic Channel Activity Detection (CAD) with ultra-fast AFC

{{ :ds_sx1261-2_v2_1.pdf |SX1262 Datasheet}}

===== STM32WL =====

e.g. STM32WLE5CCU6 (was in stock), ~$3 @ 100 at lcsc.

SOC with STM32L4 and LoRa radio.

[[https://datasheet.lcsc.com/lcsc/2208051100_STMicroelectronics-STM32WLE5CCU6_C2888218.pdf|Datasheet]]