Heltec Vision Master E213

⚠️ Check that radio.rxgain(on) and flood.advert.base (0.308) are set correctly after flashing! ⚠️

This build is based on official MeshCore 1.15.0 dev branch (as of 25-May-2026 and additionally includes the following unmerged upstream PRs/changes:

• PR2553: Limit flood advert packet forwarding --> set flood.advert.base 0...1 (0: no flood adv. forwarding, 0.308: default, 1: all flood adv. forwarding)
• PR1810: Allow direct message paths when denyf * is set
• :new: PR1727: Use hardware channel activity detection for checking interference --> Use set int.thresh 1 to activate hw based channel activity detection.
• :new: PR2377: Disable NRF52 undervoltage bootlock feature

Additional changes:

• Flood adverts are disabled (flood.advert.interval set to 0) by default
• :new: modified PR1810 to not block flood adverts but only PAYLOADTYPEGRPTXT and PAYLOADTYPEGRPDATA so that some limited flood advert distribution can be managed via PR2553 to support e.g. observer maps.

Changelog:

• Based on dev v1.15.0 as of 25-May-2026

Full Changelog: https://github.com/mattzzw/MeshCore-Evo/compare/v1.15.0-evo0.1.20...v1.15.0-evo0.1.21

v1.16_0611 pre-release for Heltec E213, Wireless Paper and E290

• New device: Heltec Vision Master E213 — full support (Companion, Repeater, Room Server).

The Heltec Vision Master E213 is now fully supported. It is an ESP32-S3 based board with a 2.13" e-ink display, SX1262 LoRa radio, and a USB-C port. The complete companion UI runs on the e-ink display — Quick Send, Contacts, Settings, Saved Locations, GPS Trace, and message preview. Repeater and Room Server firmware are also provided.

Notable characteristics:

• Always-on e-ink display — no screen timeout; the display retains its content indefinitely without power.


• Native multilingual text — Latin, Cyrillic, and Greek scripts render natively.


• I2C sensor support — environment sensors (temperature, humidity, pressure...) can be connected via the QuickLink I2C port.


• Two user buttons — the second button (GPIO21) makes navigation faster: press it to scroll up in any list, or to go back/exit any menu.

• New devices: Heltec Wireless Paper and Heltec Vision Master E290 — full support (Companion, Repeater, Room Server).

Two new e-ink boards are now supported:

• Heltec Wireless Paper — ESP32-S3 with a 2.13" e-ink display (same resolution as E213), SX1262 LoRa radio, and a compact form factor. Shares the same companion UI and firmware variants as E213.

• Heltec Vision Master E290 — ESP32-S3R8 with a larger 2.9" e-ink display (296×128), SX1262 LoRa radio, and a QuickLink I2C port for external sensors. The companion UI adapts automatically to the wider, taller display — showing more message lines and better-spaced layouts compared to the 2.13" boards.

v1.170906

• New: LR1121 radio health telemetry, with automatic image recalibration. (Companion, Repeater, Room Server — LR1121 boards)

Supply voltage and die temperature are now surfaced as a "Radio" sensor channel — on the Companion Sensors screen and via Request Telemetry. The same reading also triggers an automatic image-rejection recalibration after a >10°C drift or a 10-20 MHz retune, per the datasheet — sub-GHz only, since the 2.4 GHz path doesn't support or need it.

• Changed: a large frequency change on set radio or tempradio no longer needs a reboot. (Companion, Repeater, Room Server — boards whose radio supports it)

A move of 20 MHz or more — crossing sub-GHz bands, or between sub-GHz and 2.4 GHz — now applies on its own by re-initializing the radio in place. Previously this required a manual reboot.

• Improved: RX Duty Cycle reliability. (All roles — SX1262 and LR1121 boards, RX Duty Cycle on)

General reliability work on the RX Duty Cycle path. Among it: the RSSI fast path from the hybrid channel-sensing feature (v1.150419) is no longer a fast path once RX Duty Cycle keeps the radio asleep most of the time, so it's skipped — with RX Duty Cycle on, int.thresh > 0 now only activates CAD.

• New: Node Discovery on the Recent page. (Companion — boards with a display)

Long pressing the Recent page (formerly "Recent Advert") now opens a two-item menu — Send Zero Hop Advert (the previous one-press action) and Node Discovery. Node Discovery probes for nearby repeaters and merges the answers into the same recently-heard list, showing SNR both ways instead of an age — your signal as the repeater heard it, then its signal as you heard it. A repeater that answers but isn't a saved contact shows its public key prefix instead of a name.

The Send Advert item is removed from Settings — Recent is now the only place to send one.

• Fix: set radio/tempradio now reject a bandwidth the radio chip can't actually use. (Companion, Repeater, Room Server — all boards)

A bandwidth outside the radio's actual supported steps, typed manually via CLI, used to be accepted instead of rejected. Now checked against the exact steps the radio chip supports.

v1.170906

• New: LR1121 radio health telemetry, with automatic image recalibration. (Companion, Repeater, Room Server — LR1121 boards)

Supply voltage and die temperature are now surfaced as a "Radio" sensor channel — on the Companion Sensors screen and via Request Telemetry. The same reading also triggers an automatic image-rejection recalibration after a >10°C drift or a 10-20 MHz retune, per the datasheet — sub-GHz only, since the 2.4 GHz path doesn't support or need it.

• Changed: a large frequency change on set radio or tempradio no longer needs a reboot. (Companion, Repeater, Room Server — boards whose radio supports it)

A move of 20 MHz or more — crossing sub-GHz bands, or between sub-GHz and 2.4 GHz — now applies on its own by re-initializing the radio in place. Previously this required a manual reboot.

• Improved: RX Duty Cycle reliability. (All roles — SX1262 and LR1121 boards, RX Duty Cycle on)

General reliability work on the RX Duty Cycle path. Among it: the RSSI fast path from the hybrid channel-sensing feature (v1.150419) is no longer a fast path once RX Duty Cycle keeps the radio asleep most of the time, so it's skipped — with RX Duty Cycle on, int.thresh > 0 now only activates CAD.

• New: Node Discovery on the Recent page. (Companion — boards with a display)

Long pressing the Recent page (formerly "Recent Advert") now opens a two-item menu — Send Zero Hop Advert (the previous one-press action) and Node Discovery. Node Discovery probes for nearby repeaters and merges the answers into the same recently-heard list, showing SNR both ways instead of an age — your signal as the repeater heard it, then its signal as you heard it. A repeater that answers but isn't a saved contact shows its public key prefix instead of a name.

The Send Advert item is removed from Settings — Recent is now the only place to send one.

• Fix: set radio/tempradio now reject a bandwidth the radio chip can't actually use. (Companion, Repeater, Room Server — all boards)

A bandwidth outside the radio's actual supported steps, typed manually via CLI, used to be accepted instead of rejected. Now checked against the exact steps the radio chip supports.

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...repeater-v1.0.1

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...companion-v1.0.1

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...companion-v1.0.1

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...room-server-v1.0.1