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Hello, I am wanting to display MPG on an old VW camper van. Does anybody know of a hall effect flow sensor that can report the very low flows found in carburetors please.

terryrow last edited by

Hello, I am wanting to display MPG on an old VW camper van. Does anybody know of a hall effect flow sensor that can report the very low flows found in carburetors please. Alternative suggestions always welcome.
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arden last edited by

guess no odb port?
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mpg meter for vw camper van 1

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Hardware • • kincaidj001

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Not really, I haven't used them yet. Remember that you can use the M0 as sensor node.
Help with OTA using RFM69HCW needed please
Hardware • • doug

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I have managed to solve this it looks like the CRC failure was down to an incompatible SPI Memory chip. I am now using Brand Adesto Technologies Mfr. Part No. AT25SF041-SSHD-B RS Stock No.223-0562 and it seems to work very well now. Especially if you take Martins recommendations below @martinhjelmare said in OTA firmware updating is too slow..: I implemented a check for firmware update message in my modified SenseBenderMicro sketch, and alternative behavior in the loop if FW update is ongoing. This doesn't solve the problem of dropped messages, but could be good to speed up the update and don't waste time on sensor updates. void loop() { if (fwUpdateOngoing) { fwUpdateOngoing = false; fwUpdateOngoing = wait(OTA_WAIT_PERIOD, C_STREAM, ST_FIRMWARE_RESPONSE); } else { normalFlow(); } } void normalFlow() { // Short delay to allow buttons to properly settle sleep(5); int buttonValue = digitalRead(BUTTON_PIN); measureCount ++; sendBattery ++; bool forceTransmit = false; transmission_occured = false; #ifndef MY_OTA_FIRMWARE_FEATURE if ((measureCount == 5) && highfreq) { clock_prescale_set(clock_div_8); // Switch to 1Mhz for the reminder of the sketch, save power. highfreq = false; } #endif if (measureCount > FORCE_TRANSMIT_INTERVAL) { // force a transmission forceTransmit = true; measureCount = 0; } sendTempHumidityMeasurements(forceTransmit); if (buttonValue != oldValue) { // Send in the new buttonValue send(msg.set(buttonValue==HIGH ? 0 : 1)); oldValue = buttonValue; transmission_occured = true; } #ifdef MY_OTA_FIRMWARE_FEATURE if (transmission_occured) { fwUpdateOngoing = wait(OTA_WAIT_PERIOD, C_STREAM, ST_FIRMWARE_RESPONSE); } #endif sleep(digitalPinToInterrupt(BUTTON_PIN), CHANGE, MEASURE_INTERVAL); }
CubeCell reloaded: the SX126x hal drivers, please test
Hardware • • eiten

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@eiten Yep, already saw this one. Based on the heltec implementation, the sx-registers are mapped to specific memory regions of the mcu. Would be interesting to have here a complete ASR-specific documentation...
PCB Identity Please
Hardware • • Ironbar

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Thank you! That pointed me in the right direction.
Please help me decide. Single vs Multisensor
Hardware • • webstor

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Hello together, there is no "right" or "wrong" answer to this questions imo. Both concepts have their two sides. Personally, I prefer to go the multisensor way (and also use RS485, which limits the numbers of sensors to 32 per gateway with standard interface boards). In addition to that I also like the idea to let the arduinos decide (some) things locally or make them configurable to some extend. So things may not become completely out of controll in case there is (temporary) no controller. Advantages: Less parts, especially power adopters/batteries, less "optic irritation" better use of arduino potential (use of more than 40% of the memory, not sleeping all the time) Less RF, means also lower risk of RF conflicts (or best: no RF at all => RS485) in case of e.g. failure or power off, I will most likely notice this earlier because of the bigger "footprint" Disadvantages: its (sometimes) hard work to get things working (but also fun and satisfaction ) higher risk of messing things up because of bad code (I am just a beginner in programming. This is more related to distributed logic as mentioned above; just combining some simple examples isn't rocket science...) in case of e.g. failure or power off, a multisensor has the bigger "footprint" So it's up to you which way to go (or to which extent, to be more precise).
What I must buy in order to measure mAh please
Hardware • • DenisJ

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I already have something like this, but this one have no misurement in uAh Thanks a lot Denis
New simply node sensor project - please some advise
Hardware • • DenisJ

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Oh boys... a lot of information here. Thanks so much... but I've already place the pcb order... I have make an order for 10 pieces. Bun in the mean time I'll experiment and modify the schema thanks to you all Anyway I have placed there this capacitor ... I hope will be ok for this time. Thanks so much for all information Denis
about Arduino + NRF24L01 need help please.
Hardware • • llasking

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@llasking Have a look on the arduino forum or github - I still use the older tmrh library for point-to-point on things made before I changed over to mysensors. There is also a nrf24-lite library as well, but I have never used it.

Hello, I am wanting to display MPG on an old VW camper van. Does anybody know of a hall effect flow sensor that can report the very low flows found in carburetors please.

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Hardware • • kincaidj001

Help with OTA using RFM69HCW needed please
Hardware • • doug

CubeCell reloaded: the SX126x hal drivers, please test
Hardware • • eiten

PCB Identity Please
Hardware • • Ironbar

Please help me decide. Single vs Multisensor
Hardware • • webstor

What I must buy in order to measure mAh please
Hardware • • DenisJ

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Hardware • • DenisJ

about Arduino + NRF24L01 need help please.
Hardware • • llasking

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Hello, I am wanting to display MPG on an old VW camper van. Does anybody know of a hall effect flow sensor that can report the very low flows found in carburetors please.

Suggested Topics

Please help Noob w Hardware Hardware • • kincaidj001

Help with OTA using RFM69HCW needed please Hardware • • doug

CubeCell reloaded: the SX126x hal drivers, please test Hardware • • eiten

PCB Identity Please Hardware • • Ironbar

Please help me decide. Single vs Multisensor Hardware • • webstor

What I must buy in order to measure mAh please Hardware • • DenisJ

New simply node sensor project - please some advise Hardware • • DenisJ

about Arduino + NRF24L01 need help please. Hardware • • llasking

42Online

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Please help Noob w Hardware
Hardware • • kincaidj001

Help with OTA using RFM69HCW needed please
Hardware • • doug

CubeCell reloaded: the SX126x hal drivers, please test
Hardware • • eiten

PCB Identity Please
Hardware • • Ironbar

Please help me decide. Single vs Multisensor
Hardware • • webstor

What I must buy in order to measure mAh please
Hardware • • DenisJ

New simply node sensor project - please some advise
Hardware • • DenisJ

about Arduino + NRF24L01 need help please.
Hardware • • llasking

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