logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda

Another ELIVCO LSPA9: BSD342-2110 PCB with [LN882H] and [BL0937]

max4elektroda 4725 31

TL;DR

  • Elvico LSPA9 smart plug uses a BSD342-2110 PCB with a WL2S-labeled LN882H module, BL0937 energy metering, and a relay marked 16A/20A.
  • The case opens by pressing the lightly glued halves from the sides, then the firmware can be flashed through Rx0/Tx0 on the main PCB.
  • Only three wires are needed for flashing: 3.3 V VCC, RX, and TX, while the power pin opposite the LN882H can serve as GND.
  • A9 must be briefly shorted to GND after power-up, and flashing worked reliably at 115200 rather than 200000.
  • The included OpenBeken template maps GPIOs for LED, button, relay, Wi-Fi LED, BL0937 CF/CF1, and BL0937SEL.
Generated by the language model.
ADVERTISEMENT
Report a violation of the law
Reply Cool? Ranking DIY | New topic
Notify about new articles
📢 Listen (AI):
  • #31 21832472
    io2345
    Level 9  
    Posts: 244
    Help: 1
    Rate: 6
    In fact not only the wifi mode had changed, but the whole configuration was lost. FW-Version was of April 2025, if I remember right.
  • ADVERTISEMENT
  • #32 21832777
    max4elektroda
    Level 24  
    Posts: 745
    Help: 47
    Rate: 183
    It should be no general issue, maybe a (sad) isolated problem?
    I know it's no help for you, but hard to find if it's not a common error.
    You don't have a log from the start, maybe showing why config was erased?
    Usually the default config is loaded, if there's a CRC error for the config in flash.

    Just tried an update from 1.18.25 (January 2025) to actual 1.18.256:

    Screenshot of OpenLN882H web UI with Wi‑Fi SSID/password fields, SSID2, and web authentication settingsScreenshot of OpenLN882H web panel showing Wi‑Fi settings, SSID fields, and a “Submit” button

    Pin configuration also was present after the update
Reply Cool? Ranking DIY | New topic
Notify about new articles
📢 Listen (AI):
Report a violation of the law

Topic summary

✨ The discussion revolves around the ELIVCO LSPA9 device, specifically the BSD342-2110 PCB variant equipped with LN882H and BL0937 components. Users share insights on opening the device, stability issues, and firmware performance. Some report successful operation with the latest OpenLN882H firmware, while others experience instability and high power consumption. Users discuss power measurement techniques, MQTT integration with ioBroker, and LED behavior customization. The conversation highlights the importance of firmware versions and settings for optimal device performance.
Generated by the language model.
Today's popular

FAQ

TL;DR: Idle standby current sits at 8 – 12.5 mA—“device gets quiet hot” [Elektroda, rufus4, post #21024659]—yet three-wire flashing takes <2 min and success rate hits 100 % after a few attempts [Elektroda, max4elektroda, post #20965239]

Why it matters: Knowing the quirks avoids bricked plugs, overheats, and MQTT headaches.

Quick Facts

• PCB: BSD342-2110 (or BSD34-202110 variant) with LN882H Wi-Fi SiP + BL0937 meter [Elektroda, max4elektroda, post #20965239] • Relay rating: printed "16 A / 20 A"; treat as 16 A continuous for safety [Elektroda, photo, post #20965239] • Flash wiring: only VCC 3.3 V, RX0, TX0 needed; use mains pin as GND [Elektroda, 20965239] • Power draw (OpenBK, relay OFF/ON): 8.5 mA / 12.5 mA ≈ 2–3 W [Elektroda, rufus4, post #21024659] • Selling link: AliExpress “Digitaling Store”, item 1005005665258417 (availability may change) [Elektroda, 20965724]

How do I open the Elvico LSPA9 plug without breaking the case?

Squeeze the long sides in a vice padded with cardboard until the light glue joint cracks, then twist slightly; five units opened this way showed no damage [Elektroda, 20965239]

Which pins must I solder to flash OpenBeken firmware?

Solder only three: VCC 3.3 V, RX0, TX0. Clip the mains pin opposite the LN882H module for GND. Short boot-pin A9 to GND for a few seconds at power-up to enter flash mode [Elektroda, 20965239]

Quick 3-step flashing procedure?

  1. Connect VCC, RX0, TX0, and use mains pin as GND.
  2. Power plug, momentarily short A9 to GND; LED stays dark if timing is right.
  3. Run LN882H_CMD_Tool at 115 200 bps: download flash 0x0 firmware.bin. Retry every 5 s if needed. [Elektroda, 20965239]

Why does firmware ≥1.17.513 reboot repeatedly?

Early builds hit watchdog resets when the Web-GUI loads; accessing only the Web-app or downgrading to ≤512 stops the loop [Elektroda, Raufaser, post #21015608] Firmware 1.17.530 and later resolved the issue for most users [Elektroda, 21034099]

My socket disappears from Wi-Fi after 48 h—fixes?

Update to OpenLN882H_1.17.530 or newer and issue Powersave 1 after boot; units then showed >168 h stable uptime [Elektroda, 21034099] Edge case: one user needed a full re-flash with vendor FW first [Elektroda, rufus4, post #21022643]

What is the correct button and relay pin mapping?

Default template maps A3 to Btn 0 and A11 to Rel 0. If the hardware variant uses another GPIO, locate it with Pin Doctor and update the template [Elektroda, 21022708]

Can I change the LED colours?

Yes. Set GPIO10 to LED for Tuya-style (blue OFF, red ON) or to WifiLED for activity-only; WifiLED_n lights purple because both diodes are active [Elektroda, #21067095; #21067385].

Recommended MQTT topics for ioBroker or Home Assistant?

OpenBeken publishes state to /0/get and accepts commands at /0/set. Creating cmnd/stat branches isn’t required. Home Assistant auto-discovers; ioBroker needs manual numeric writable state ‘set’. Button presses update the ‘get’ topic instantly [Elektroda, #21064461; #21064315].

What’s the real current limit of the relay?

Label shows 16 A on plastic and 20 A on metal can. Treat it as 16 A continuous (≈ 3.5 kW @ 230 V) to stay within IEC safety margins [Song Chuan datasheet] & [Elektroda, 20965239]

Does Powersave reduce heat?

Yes. CPU temperature drops from ~60 °C (Powersave 0) to ~40 °C (Powersave 1). Total draw remains ~8 mA idle, yet casing feels cooler [Elektroda, 21023618]

Where can I still buy the LN882H LSPA9 version?

Recent verified orders came from AliExpress ‘Digitaling Store’, item 1005005665258417; supply can change without notice [Elektroda, #20965724; #21004486].

Edge case: What if the push-button feels unresponsive?

Several BSD34-202110 boards shipped with stiff tact switches; extra pressure needed. Replace the 4-pin SMD switch or add a parallel through-hole tact for reliable clicks [Elektroda, rufus4, post #21022878]

Statistic: How does LSPA9 idle power compare to Shelly Plug?

At 2–3 W idle, LSPA9 consumes roughly double a Shelly Plug’s ~1 W standby, so bulk usage raises energy bills by about €1 year each per socket (0.30 €/kWh) [Elektroda, 21024659]

Is DHT sensor support working?

Not yet; OpenBeken on LN882H lacks stable DHT driver as of build 1.17.530. Expect future commits to enable it [Elektroda, rufus4, post #21034099]
Generated by the language model.
ADVERTISEMENT