GizanTech

GizanTech As a team of engineers, we strive to provide software solutions focused on Industry 4.0

GizanTech is a software company with an aspiration to make a difference in the Fourth Industrial Revolution. Our team of engineers is specialized in Embedded Systems, IoT, Android, Web Development, and other areas. From the beginning, our objective has been to deliver simple yet effective solutions that promote digital growth and meet the satisfaction of our clients. With numerous successful projects under our belt, our vision is to become a leading service provider for enterprises at the forefront of Industry 4.0.

Every board we ship gets 40 seconds on a bed-of-nails fixture before it goes in a box. Rail voltages under load, RS-485 ...
05/09/2026

Every board we ship gets 40 seconds on a bed-of-nails fixture before it goes in a box. Rail voltages under load, RS-485 differential swing, current draw at idle, eFuse burn, then a unique key provisioned and read back. Last batch it caught three boards out of a hundred — one cold solder joint on a transceiver, two with 8 mA of extra idle draw that would have quietly halved battery life in the field. What does your end-of-line test actually measure?

Arduino's new Uno Q pairs a Qualcomm Linux SoC with an STM32 MCU on one board, and honestly the split-brain idea is soun...
05/09/2026

Arduino's new Uno Q pairs a Qualcomm Linux SoC with an STM32 MCU on one board, and honestly the split-brain idea is sound — Linux for the messy stuff, a real MCU for deterministic timing. That's the same architecture we build for industrial clients, except we do it with an ESP32 and a gateway SBC that we can still buy in 2029. That's the actual problem here: the timing is rough with the CRA landing, and a hybrid board means two update paths, two attack surfaces, and two sets of security-update obligations. Nice dev board. I wouldn't put it near a production fleet until the lifecycle story is written down.

Client in Rotterdam swore our gateway was dropping Modbus frames. Errors clustered between 09:00 and 15:00 on weekdays o...
04/09/2026

Client in Rotterdam swore our gateway was dropping Modbus frames. Errors clustered between 09:00 and 15:00 on weekdays only — which is not how firmware fails, but exactly how a welding shop 30 m up the quay operates. The fix wasn't in code: the RS-485 shield was landed at both ends, so we had a ground loop happily picking up every arc strike. One-end shield termination, a 100 Ω bias rework, and 11 weeks later that link has logged zero CRC faults.

An ESP32-P4 weather station that swallows LoRa nodes, ESP-NOW nodes and public weather APIs into one dashboard — and the...
04/09/2026

An ESP32-P4 weather station that swallows LoRa nodes, ESP-NOW nodes and public weather APIs into one dashboard — and the part worth reading isn't the P4 at all, it's that the radio work sits on a C6 companion over SDIO while the P4 just drives pixels. We've been shipping that split on industrial boards for a while: give the app core a display and a filesystem, and let a second chip own the RF timing so nothing stalls when SPIFFS decides to have a moment. What kills these builds in the field isn't the demo, it's month two — two transports carrying the same reading, drifting RTCs, and a LoRa duty cycle you didn't budget for at 40 nodes. Our rule now is that every reading gets a node ID plus a monotonic sequence number at the source, so the gateway can dedupe instead of guessing.

Small thing that eats a week: Modbus RTU says frames are separated by 3.5 character times of silence. At 9600 baud that'...
03/09/2026

Small thing that eats a week: Modbus RTU says frames are separated by 3.5 character times of silence. At 9600 baud that's 4 ms — comfortable. At 115200 it's 300 µs, and the spec itself says just use 1.75 ms fixed above 19200. Most stacks ignore that line, keep computing the tiny value, and then a task switch or a Wi-Fi burst on the ESP32 stretches a gap mid-frame and the slave splits one packet into two garbage ones. If your CRC errors go up when you go faster, that's not noise on the line — that's your own scheduler.

The Things Conference lands in Amsterdam again and the agenda tells you where the industry actually is: LoRaWAN is no lo...
03/09/2026

The Things Conference lands in Amsterdam again and the agenda tells you where the industry actually is: LoRaWAN is no longer the headline on its own, it's LoRaWAN plus something running inference on the node. We see it in the briefs coming from our NL and AU clients — nobody asks "can it send the reading" anymore, they ask "can it decide on-device so I'm not paying for airtime on 99% boring data". That's a firmware and power-budget problem before it's an AI problem, and it usually means re-thinking the duty cycle, not adding a bigger MCU. If you're shipping LoRaWAN sensors this year, are you moving decisions onto the node, or still sending everything up and filtering in the cloud?

Every client who asks us to "make the battery last longer" expects us to recommend a bigger cell. On a canal-side teleme...
02/09/2026

Every client who asks us to "make the battery last longer" expects us to recommend a bigger cell. On a canal-side telemetry node last month the fix cost nothing: the node was waking, joining the network, sending 41 bytes, then sitting in a 900 ms teardown wait before deep sleep. We cut the teardown, moved the sensor warm-up to overlap the radio join, and the average draw dropped from 310 µA to 74 µA — same battery, same board, roughly 4x the field life. Deep sleep current is the number everyone quotes; awake-time is the number that actually drains the pack.

CrossPoint dropping open firmware for ESP32 ePaper readers is the kind of release I actually read the source of. The har...
02/09/2026

CrossPoint dropping open firmware for ESP32 ePaper readers is the kind of release I actually read the source of. The hard part on these boards was never the UI — it's the refresh: full-refresh flashes eat your battery budget, partial refresh leaves ghosting after a few dozen updates, and the panel's inrush during a waveform sweep will brown out a marginal 3V3 rail faster than any WiFi burst. We've shipped ePaper on industrial nodes where the device sleeps at ~15µA for hours and the whole power design lives or dies on that one refresh spike. Anyone here settled on a clean partial/full refresh cadence that doesn't ghost, or are you still forcing a full clear every N pages?

A water-quality buoy came back from a Dutch canal last month after 14 months in the water, and we cut it open before wri...
01/09/2026

A water-quality buoy came back from a Dutch canal last month after 14 months in the water, and we cut it open before writing a single line of the redesign. The board itself was fine — conformal coating intact, ESP32-S3 booting on the first try. What was wrecked was the M12 connector on the RS-485 sensor run: the gland had wicked moisture up the cable jacket and corroded the shield drain, so the last 40 days of telemetry were quietly full of CRC retries nobody had flagged. Two changes came out of that autopsy: a potted strain relief at the gland, and a Modbus error-rate counter published in the heartbeat so the next one tells us before we have to open it.

The long tail of smart home stuff is real — every client we take on wants 2,000 units, not 2 million, and the BOM math i...
01/09/2026

The long tail of smart home stuff is real — every client we take on wants 2,000 units, not 2 million, and the BOM math is the easy part. What kills those products is year three: no OTA server, no signed images, no way to push a fix when a cloud API changes under you. We've been handed "finished" ESP32 boards where the update path was a USB cable and a hope, and rewriting that after launch costs more than doing it right in week two. Low volume doesn't mean low obligation — the firmware still has to survive a decade in someone's wall. If you're shipping a niche product, when did you build your update path — before or after the first field bug?

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