I was asked to design an ESL demo system. Since it is a DEMO, so I use two ez430-RF2500 kits to build up APx1+EDx3 simple network with SimpliciTI data hub model.
The demonstration was successful. I use this mini kits with following extra components/modification.
- 2" dot-matrix E-paper panel on label,
- PL2303 USB/UART bridge (256kbps) for AP,
- Network daemon in Python,
- Web server in LAMP with Web service API
- An Android barcode OCR application,
Now we want to push it into a real product for customer site deployment. That means a lot of works. However, I am not confident that if SimpliciTI can support high density WSN network or not.
- One AP should support 5K~50K nodes in its RF range.
- One AP should support 128 active nodes in its RAM cache.
- Each AP talks on different RF channel from neighboring cells.
- Most of nodes are in deep sleep, while E-paper keeps content without supply.
- LinkID of each nodes will be circulated in RAM cache when ED enters sleep mode.
- ED listens to traffic before trying to log-in network.
- Data exchange ranges from 4KB (minimal screen shot) to 32KB (for OTA IAP)
Is there any simulate tool I can use to evaluate network? For example, to simulate nodes communication between nodes to APs and check traffic jam in case traffic interrupt, resuming?
Yours sincerely
Allan K Liu