Hi Guys Why not supply it with 3.3v as well and save all this trouble? Why do you need the 1.8v rail at all? Is there something I'm missing? The power supply to the sensor is hooked up to a 3v Li ion coin cell. Want a regulated supply so I am sure what voltage is goin into the the VDD. Although I am...

Hello ESP_Sprite Thanks for the response once again. I was thinking using the level shifter at the system end rather than at the sensor end. According to the Idd vs Vdd graph in the datasheet, the sensor consumes more current at higher voltages. If i shift the voltage down from 3.3v to 1.8v at the s...

Hello WiFive Thanks for the reply. Please pardon my noobiness, but do you mean using a level shifter for 3.3v to 1.8v or the other way round? Like where do I apply the level shifting? Am I shifting the signal into/out of the ESP32 from 3.3 to 1.8v or would it be better engineering to shift from 1.8v...

Hello ESP_Sprite Thanks for the reply. I understand the "iffyness" but was wondering if thats safe for the flash which is meant to be 3.3v right? 1.8v isnt enough juice to power it...no? I dont really need the flash except for bulk data storage and almost none existent retrieval as the data will be ...

Hello hobbyists, engineers and experts! I am designing a system using the Wroom32d which comes with an integrated SPI flash useful for my application use case. My dilemma : I am interfacing an I2C sensor operating at 1.8v with the Wroom32d. I am aware from the datasheet on page 5 which states that t...

Hello...

I am still hoping to get some assistance with the questions asked in the previous post.

Thanks a bunch

Okay, so you're saying the ESP32 is effectively going to be useless in a node that has a coin cell but not an alkaline? That's an unconventional choice, but it can be a viable one I guess. Precisely. Device comes factory fitted with alkaline cells. Coin cell can be added for high power nodes. In th...

I am still confused by how you would think your mesh would work, that is, which nodes would have which batteries installed. As far as I can see, a node with only a coin cell would be useless as the ESP32 can't run from that and as such the node cannot join in the mesh. A node with only alkaline bat...

Sure, but what is the use of the coin cell? It seems that you want to keep the sensors powered even when the ESP32 batteries run dry, so I assume there is some intelligence in the sensors that can store the readings? Hello again and thanks for the reply. The idea behind the coin cell battery is to ...

Hi.. I apologize. I was meant to upload the 4th design. While awaiting the approval of this post I kind of got carried away with other things. Here it is: DesignAsk_Update_3.PNG I also made a mistake in the third design I uploaded. Here is the corrected one: DesignAsk_Update_2Cor.PNG What's the use ...