Hemisson FAQ
Q: What can I do with Hemisson?
A: Follow this link: Hemisson applications.
Q: Where can I ask questions about Hemisson?
A: In the Hemisson Forum. You can ask questions and answer questions of others users.
Q: Which are the used lines in the serial cable?
A: Just three lines pins 5 (Gnd), 3 (Tx), 2 (Rx).
Q: How to configure Hyperterminal to communicate with Hemisson?
A: Click on “Start/Programs/Accessories/Hyperterminal”.
Configuration:
- 115200 baud
- 8 data bit
- 1 stop bit
- No parity
- No flux control
Q: What are the differences between Hemisson and Khepera?
A:
| Features | HEMISSON | KHEPERA |
| Diameter | 12cm (4.7″) | Diameter: 6cm (2.4″) |
| Processor | 8-bit | 32-bit |
| RAM Memory | 0.3Kb | 512Kb |
| Flash Memory | 8Kb | 512Kb |
| Control loop | No control loop (no encoder) | PID control on position and speed |
| IR sensor range | Up to 20mm | Up to 100mm |
| Development Environment | Optional PIC C Compiler | Includes Standard ANSI C Development Environment |
Khepera is fitted for research and advanced education, or for applications that imply miniatureness, odometry or powerful onboard processing.
Q: I have no serial port on my PC. How do I connect Hemisson?
A: In your favorite PC shop, you can find USB<>Serial adapter.
Q: My Hemisson seems to be blocked in programming mode (Green and Red LED permanently on) but I cannot reprogram it with Hemisson Uploader. How can I repair it?
Or… I can connect my Hemisson only at 57600bps. How can I repair it?
A: This might happen if you switch Hemisson on and off too fast or if you interrupt a transfer from BotStudio. Here is the repair procedure:
- Install and launch Hemisson Uploader version 1.5 (available below).
- Select a baudrate of 56000.
- Switch your Hemisson Off.
- Connect your Hemisson to your PC serial port.
- Set your Hemisson in programming mode (Prog/Exec Switch).
- Switch your Hemisson On.
- Upload the latest Hemisson firmware (available below) with Hemisson Uploader.
- If the upload do not work, repeat the operation a second time.